runtime/cgo: add .file directive to GNU assembly files

Without it, at least on ARM64 with older BFD linker, it will
include the file of the object file (which is of a temporary path)
as a debug symbol into the binary, causing the build to be
nondeterministic. Adding a .file directive makes it to create a
STT_FILE symbol with deterministic input, and prevent the linker
creating one using the temporary object file path.

Fixes #57035.

Change-Id: I3ab716b240f60f7a891af2f7e10b467df67d1f31
Reviewed-on: https://go-review.googlesource.com/c/go/+/454838
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>

src/runtime/cgo/gcc_386.S

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+.file "gcc_386.S"
+
 /*
  * Apple still insists on underscore prefixes for C function names.
  */

src/runtime/cgo/gcc_aix_ppc64.S

@@ -5,6 +5,8 @@
 // +build ppc64
 // +build aix
 
+.file "gcc_aix_ppc64.S"
+
 /*
  * void crosscall_ppc64(void (*fn)(void), void *g)
  *

src/runtime/cgo/gcc_amd64.S

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+.file "gcc_amd64.S"
+
 /*
  * Apple still insists on underscore prefixes for C function names.
  */

src/runtime/cgo/gcc_arm.S

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+.file "gcc_arm.S"
+
 /*
  * Apple still insists on underscore prefixes for C function names.
  */

src/runtime/cgo/gcc_arm64.S

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+.file "gcc_arm64.S"
+
 /*
  * Apple still insists on underscore prefixes for C function names.
  */

src/runtime/cgo/gcc_linux_ppc64x.S

@@ -5,6 +5,8 @@
 // +build ppc64 ppc64le
 // +build linux
 
+.file "gcc_linux_ppc64x.S"
+
 /*
  * Apple still insists on underscore prefixes for C function names.
  */

src/runtime/cgo/gcc_loong64.S

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+.file "gcc_loong4.S"
+
 /*
  * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
  *

src/runtime/cgo/gcc_mips64x.S

@@ -4,6 +4,8 @@
 
 // +build mips64 mips64le
 
+.file "gcc_mips64x.S"
+
 /*
  * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
  *

src/runtime/cgo/gcc_mipsx.S

@@ -4,6 +4,8 @@
 
 // +build mips mipsle
 
+.file "gcc_mipsx.S"
+
 /*
  * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
  *

src/runtime/cgo/gcc_riscv64.S

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+.file "gcc_riscv64.S"
+
 /*
  * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
  *

src/runtime/cgo/gcc_s390x.S

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+.file "gcc_s390x.S"
+
 /*
  * void crosscall_s390x(void (*fn)(void), void *g)
  *