make project_prefix_check available to all repos

BUG=chromium:466264
TEST=upload works

Change-Id: Ia388634f47140b440c856c3b932ceb2ffd989f39
Reviewed-on: https://chromium-review.googlesource.com/1095330
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>
1 file changed