build: move goapi, quietgcc, cgo, gotype, ebnflint into go-tool

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5552054

src/Make.inc

@@ -105,8 +105,8 @@ LD=$(QUOTED_GOROOT)/bin/go-tool/$(O)l
 OS=568vq
 CFLAGS=-FVw
 
-HOST_CC=quietgcc
-HOST_LD=quietgcc
+HOST_CC=$(QUOTED_GOROOT)/bin/go-tool/quietgcc
+HOST_LD=$(QUOTED_GOROOT)/bin/go-tool/quietgcc
 HOST_O=o
 HOST_YFLAGS=-d
 HOST_AR?=ar

src/cmd/api/goapi.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Goapi computes the exported API of a set of Go packages.
+// Api computes the exported API of a set of Go packages.
 package main
 
 import (

src/cmd/go/pkg.go

@@ -229,9 +229,13 @@ Loop:
 // isGoTool is the list of directories for Go programs that are installed in
 // $GOROOT/bin/go-tool.
 var isGoTool = map[string]bool{
+	"cmd/api":      true,
+	"cmd/cgo":      true,
 	"cmd/fix":      true,
 	"cmd/vet":      true,
 	"cmd/yacc":     true,
+	"exp/gotype":   true,
+	"exp/ebnflint": true,
 }
 
 func scanPackage(ctxt *build.Context, t *build.Tree, arg, importPath, dir string, stk *importStack) *Package {

src/make.bash

@@ -44,10 +44,11 @@ export MAKEFLAGS
 unset CDPATH	# in case user has it set
 
 rm -f "$GOBIN"/quietgcc
+rm -f "$GOROOT/bin/go-tool/quietgcc"
 CC=${CC:-gcc}
 export CC
-sed -e "s|@CC@|$CC|" < "$GOROOT"/src/quietgcc.bash > "$GOBIN"/quietgcc
-chmod +x "$GOBIN"/quietgcc
+sed -e "s|@CC@|$CC|" < "$GOROOT"/src/quietgcc.bash > "$GOROOT"/bin/go-tool/quietgcc
+chmod +x "$GOROOT"/bin/go-tool/quietgcc
 
 export GOMAKE="$GOROOT"/bin/go-tool/make
 rm -f "$GOBIN"/gomake

src/pkg/runtime/autogen.sh

@@ -27,7 +27,7 @@ if [ "$GOROOT" = "" ]; then
 fi
 
 # Use goc2c to translate .goc files into arch-specific .c files.
-quietgcc -o goc2c -I "$GOROOT/include" goc2c.c "$GOROOT/lib/lib9.a"
+"$GOROOT"/bin/go-tool/quietgcc -o goc2c -I "$GOROOT/include" goc2c.c "$GOROOT/lib/lib9.a"
 for file in *.goc
 do
 	for arch in $GOARCHES
@@ -39,7 +39,7 @@ do
 done
 
 # Version constants.
-quietgcc -o mkversion -I "$GOROOT/include" mkversion.c "$GOROOT/lib/lib9.a"
+"$GOROOT"/bin/go-tool/quietgcc -o mkversion -I "$GOROOT/include" mkversion.c "$GOROOT/lib/lib9.a"
 GOROOT="$GOROOT_FINAL" ./mkversion >z.tmp
 mv z.tmp zversion.go