cmd/ld: fix windows build

Fixes #4948.

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/7445045

src/cmd/ld/ldpe.c

@@ -320,12 +320,6 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn)
 			goto bad;
 	
 		s = sym->sym;
-		if(s->outer != S) {
-			if(s->dupok)
-				continue;
-			diag("%s: duplicate symbol reference: %s in both %s and %s", pn, s->name, s->outer->name, sect->sym->name);
-			errorexit();
-		}
 		if(sym->sectnum == 0) {// extern
 			if(s->type == SDYNIMPORT)
 				s->plt = -2; // flag for dynimport in PE object files.
@@ -344,6 +338,13 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn)
 
 		if(sect == nil) 
 			return;
+
+		if(s->outer != S) {
+			if(s->dupok)
+				continue;
+			diag("%s: duplicate symbol reference: %s in both %s and %s", pn, s->name, s->outer->name, sect->sym->name);
+			errorexit();
+		}
 		s->sub = sect->sym->sub;
 		sect->sym->sub = s;
 		s->type = sect->sym->type | SSUB;

src/run.bat

@@ -54,8 +54,6 @@ echo.
 
 if not "%GOHOSTOS%-%GOOS%-%GOARCH%-%CGO_ENABLED%" == "windows-windows-amd64-1" goto norace
 echo # Testing race detector.
-echo # skipping test due to bug (http://code.google.com/p/go/issues/detail?id=4948).
-goto norace
 go test -race -i flag
 if errorlevel 1 goto fail
 go test -race -short flag