5g, 6g: comment out uses of -r

R=ken2
CC=golang-dev
https://golang.org/cl/5299043

src/cmd/5g/gsubr.c

@@ -356,7 +356,7 @@ regalloc(Node *n, Type *t, Node *o)
 {
 	int i, et, fixfree, floatfree;
 
-	if(debug['r']) {
+	if(0 && debug['r']) {
 		fixfree = 0;
 		for(i=REGALLOC_R0; i<=REGALLOC_RMAX; i++)
 			if(reg[i] == 0)
@@ -429,7 +429,7 @@ regfree(Node *n)
 {
 	int i, fixfree, floatfree;
 
-	if(debug['r']) {
+	if(0 && debug['r']) {
 		fixfree = 0;
 		for(i=REGALLOC_R0; i<=REGALLOC_RMAX; i++)
 			if(reg[i] == 0)

src/cmd/6g/gobj.c

@@ -506,7 +506,7 @@ genembedtramp(Type *rcvr, Type *method, Sym *newnam, int iface)
 	
 	USED(iface);
 
-	if(debug['r'])
+	if(0 && debug['r'])
 		print("genembedtramp %T %T %S\n", rcvr, method, newnam);
 
 	e = method->sym;