runtime/cgo: more +build cgo tags

Followup to CL 19001.

Change-Id: I7fa838b1ee8df53229e9dd29a231c2f9b2aa3f69
Reviewed-on: https://go-review.googlesource.com/19003
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/runtime/cgo/gcc_android.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <stdarg.h>
 #include <android/log.h>
 #include "libcgo.h"

src/runtime/cgo/gcc_android_386.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <string.h> /* for strerror */
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_android_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <string.h> /* for strerror */
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_android_arm.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <pthread.h>
 #include <signal.h>
 #include <stdio.h>

src/runtime/cgo/gcc_android_arm64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <pthread.h>
 #include <signal.h>
 #include <stdio.h>

src/runtime/cgo/gcc_darwin_386.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <string.h> /* for strerror */
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_darwin_arm.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <limits.h>
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_darwin_arm64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <limits.h>
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_dragonfly_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <sys/signalvar.h>
 #include <pthread.h>

src/runtime/cgo/gcc_fatalf.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 // +build !android,linux
 
 #include <stdarg.h>

src/runtime/cgo/gcc_freebsd_386.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <sys/signalvar.h>
 #include <pthread.h>

src/runtime/cgo/gcc_freebsd_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <sys/signalvar.h>
 #include <pthread.h>

src/runtime/cgo/gcc_freebsd_arm.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <machine/sysarch.h>
 #include <sys/signalvar.h>

src/runtime/cgo/gcc_libinit_linux_ppc64x.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 // TODO: see issue #10410
 // +build linux
 // +build ppc64 ppc64le

src/runtime/cgo/gcc_libinit_openbsd.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <stdio.h>
 #include <stdlib.h>
 

src/runtime/cgo/gcc_libinit_windows.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <stdio.h>
 #include <stdlib.h>
 

src/runtime/cgo/gcc_linux_386.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <pthread.h>
 #include <string.h>
 #include <signal.h>

src/runtime/cgo/gcc_linux_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <pthread.h>
 #include <errno.h>
 #include <string.h> // strerror

src/runtime/cgo/gcc_linux_arm.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <pthread.h>
 #include <string.h>
 #include <signal.h>

src/runtime/cgo/gcc_linux_arm64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <pthread.h>
 #include <string.h>
 #include <signal.h>

src/runtime/cgo/gcc_linux_ppc64x.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 // +build ppc64 ppc64le
 
 #include <pthread.h>

src/runtime/cgo/gcc_mmap.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 // +build linux,amd64
 
 #include <errno.h>

src/runtime/cgo/gcc_netbsd_386.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_netbsd_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_netbsd_arm.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <pthread.h>
 #include <signal.h>

src/runtime/cgo/gcc_openbsd_386.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <dlfcn.h>
 #include <errno.h>

src/runtime/cgo/gcc_openbsd_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <sys/types.h>
 #include <dlfcn.h>
 #include <errno.h>

src/runtime/cgo/gcc_signal_darwin_armx.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 // Emulation of the Unix signal SIGSEGV.
 //
 // On iOS, Go tests and apps under development are run by lldb.

src/runtime/cgo/gcc_signal_darwin_lldb.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 // +build !lldb
 // +build darwin
 // +build arm arm64

src/runtime/cgo/gcc_solaris_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #include <pthread.h>
 #include <string.h>
 #include <signal.h>

src/runtime/cgo/gcc_windows_386.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <process.h>

src/runtime/cgo/gcc_windows_amd64.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
+
 #define WIN64_LEAN_AND_MEAN
 #include <windows.h>
 #include <process.h>