repohooks: Allow BUG=chromium:1234.

We previously just allowed references to the chromium-os and
chrome-os-partner trackers.

Something else will need to be changed to linkify the BUG
line in the web interface.

BUG=none
TEST=referenced an arbitrary chromium issue when first uploading this change

Change-Id: Ibb85016eb8263cdf62a3e579eb2d62bc50e917ac
Reviewed-on: https://gerrit.chromium.org/gerrit/13941
Reviewed-by: David McMahon <djmm@chromium.org>
Tested-by: David McMahon <djmm@chromium.org>
Tested-by: Daniel Erat <derat@chromium.org>
Commit-Ready: Daniel Erat <derat@chromium.org>
1 file changed