[dev.cc] cmd/go, liblink: turn off verification against Go code

The upcoming merge is going to break the synchrony.
Will restore separately.

Change-Id: I90946119a0901e24063b190d1a074594af7654c7
Reviewed-on: https://go-review.googlesource.com/3888Reviewed-by: Russ Cox <rsc@golang.org>

src/cmd/go/build.go

@@ -1675,7 +1675,7 @@ func (gcToolchain) gc(b *builder, p *Package, archive, obj string, asmhdr bool,
 // verifyAsm specifies whether to check the assemblers written in Go
 // against the assemblers written in C. If set, asm will run both (say) 6a and new6a
 // and fail if the two produce different output files.
-const verifyAsm = true
+const verifyAsm = false
 
 func (gcToolchain) asm(b *builder, p *Package, obj, ofile, sfile string) error {
 	// Add -I pkg/GOOS_GOARCH so #include "textflag.h" works in .s files.

src/liblink/objfile.c

@@ -143,7 +143,7 @@ writeobj(Link *ctxt, Biobuf *b)
 	// we will hard code the GOOBJ=1 behavior.
 	env = getenv("GOOBJ");
 	if(env == nil)
-		env = "2";
+		env = "0";
 	if(atoi(env) == 0) {
 		writeobjdirect(ctxt, b);
 		return;