Constants: Mark kayle-cros-internal as branchable.

Allow us to push branches to the Kayle remotes despite their special
handling.

Also make an assert in git.py more informative in case it ever fires
again.

CQ-DEPEND=CL:*181620
BUG=chromium:428051
TEST=Unittests (not much)

Change-Id: I10f71786e66dbee6948eaf889d038afdd1a322f1
Reviewed-on: https://chromium-review.googlesource.com/226164
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Commit-Queue: Don Garrett <dgarrett@chromium.org>
Tested-by: Don Garrett <dgarrett@chromium.org>
2 files changed