fix build: more libcgo references

R=r
CC=golang-dev
https://golang.org/cl/3448043

src/clean.bash

@@ -19,7 +19,7 @@ if [ "$1" != "--nopkg" ]; then
 	rm -rf "$GOROOT"/pkg/${GOOS}_$GOARCH
 fi
 rm -f "$GOROOT"/lib/*.a
-for i in lib9 libbio libcgo libmach cmd pkg \
+for i in lib9 libbio libmach cmd pkg \
 	../misc/cgo/gmp ../misc/cgo/stdio \
 	../test/bench ../test/garbage
 do(

src/make.bash

@@ -62,7 +62,7 @@ bash "$GOROOT"/src/clean.bash
 for i in lib9 libbio libmach cmd pkg
 do
 	case "$i-$GOOS-$GOARCH" in
-	libcgo-nacl-* | cmd/*-nacl-* | libcgo-linux-arm)
+	cmd/*-nacl-*)
 		;;
 	*)
 		# The ( ) here are to preserve the current directory