Orderfile: add option to build for monochrome.

This is helpful for local testing, where our older devices are getting flaky,
and will eventually be necessary when the bot upgrades.

Bug: 758566
Change-Id: If1d36f17c3ffd8605d14ab1aa30d4df0acafc3ad
Reviewed-on: https://chromium-review.googlesource.com/1219688
Reviewed-by: Egor Pasko <pasko@chromium.org>
Reviewed-by: Benoit L <lizeb@chromium.org>
Commit-Queue: Matthew Cary <mattcary@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591322}
1 file changed