goprotobuf: Fixes for Clone and Equal.

R=r
CC=golang-dev
http://codereview.appspot.com/6419071
diff --git a/proto/text_parser_test.go b/proto/text_parser_test.go
index cf86ad3..9f334fb 100644
--- a/proto/text_parser_test.go
+++ b/proto/text_parser_test.go
@@ -359,7 +359,7 @@
 	exp := &RepeatedEnum{
 		Color: []RepeatedEnum_Color{RepeatedEnum_RED},
 	}
-	if !reflect.DeepEqual(pb, exp) {
+	if !Equal(pb, exp) {
 		t.Errorf("Incorrect populated \nHave: %v\nWant: %v", pb, exp)
 	}
 }