GitLab

Generalizes the ability to specify specific revisions for other
repositories when using the VR bisect script. Previously, this was only
available as an option for specifying a clank revision, but can now be
used if some other repository is causing compile errors in the
regression range.

Change-Id: Ieb5045b21989541102a1f57bcf17e0b0e18f710c
Reviewed-on: https://chromium-review.googlesource.com/956562
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541944}