gc: format nits

src/cmd/gc/bits.c: corrected a mistaken format;
src/cmd/gc/go.h: %E can accept uints.

R=rsc
CC=golang-dev
https://golang.org/cl/5331041

src/cmd/gc/bits.c

@@ -151,7 +151,7 @@ Qconv(Fmt *fp)
 		else
 			fmtprint(fp, " ");
 		if(var[i].node == N || var[i].node->sym == S)
-			fmtprint(fp, "$%lld", i);
+			fmtprint(fp, "$%d", i);
 		else {
 			fmtprint(fp, "%s", var[i].node->sym->name);
 			if(var[i].offset != 0)

src/cmd/gc/go.h

@@ -1331,6 +1331,7 @@ void	zname(Biobuf *b, Sym *s, int t);
 #pragma	varargck	type	"D"	Addr*
 #pragma	varargck	type	"lD"	Addr*
 #pragma	varargck	type	"E"	int
+#pragma	varargck	type	"E"	uint
 #pragma	varargck	type	"F"	Mpflt*
 #pragma	varargck	type	"H"	NodeList*
 #pragma	varargck	type	"J"	Node*