GitLab

Some CI builders are mirrors for CQ try builders despite not being a
part of the main waterfall. These builders are handled by separate
sheriffing rotations for trunk, but the branches only have a single
rotation, so make sure that when config is generated for the branch,
they appear on the main console.

Change-Id: I6e7370606968d9a255eb08b5a7c4d2c0fef90220
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367635Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800281}