really ignore all generated goldens

Author: diegomarquezp

.gitignore

@@ -24,7 +24,7 @@ target/
 # library generation
 **/output/
 **/googleapis
-library_generation/test/resources/goldens/
+library_generation/test/**/golden*/
 library_generation/test/resources/test_repo_level_postprocess/
 **/*egg-info/
 **/build/