[dev.cc] cmd/go: enable verifyAsm for asm on ARM

Change-Id: I182ea770110255a5ac1c91cf30dd650696a8f1db
Reviewed-on: https://go-review.googlesource.com/4961Reviewed-by: Russ Cox <rsc@golang.org>

src/cmd/go/build.go

@@ -1693,7 +1693,7 @@ func (gcToolchain) asm(b *builder, p *Package, obj, ofile, sfile string) error {
 			return err
 		}
 		switch goarch {
-		case "386", "amd64": // Asm only supports these architectures so far.
+		case "386", "amd64", "amd64p32", "arm": // Asm only supports these architectures so far.
 			if err := asmVerify(b, p, "asm", ofile, args); err != nil {
 				return err
 			}