goprotobuf: update to go 1 import strings

R=dsymonds
CC=golang-dev
http://codereview.appspot.com/5496065
diff --git a/proto/clone_test.go b/proto/clone_test.go
index c9c4a2f..1325938 100644
--- a/proto/clone_test.go
+++ b/proto/clone_test.go
@@ -35,7 +35,7 @@
 	"log"
 	"testing"
 
-	"goprotobuf.googlecode.com/hg/proto"
+	"code.google.com/p/goprotobuf/proto"
 
 	pb "./testdata/_obj/test_proto"
 )