Merge branch 'gitignore-po-timestamp' into 'master'

Git ignore po files ending in time_stamp

See merge request gitlab-org/gitlab-ce!14615

.gitignore

@@ -63,4 +63,5 @@ eslint-report.html
 /.gitlab_workhorse_secret
 /webpack-report/
 /locale/**/LC_MESSAGES
+/locale/**/*.time_stamp
 /.rspec