Add beltino factory to cbuildbot_config.py

This will enable beltino factory builder.
BUG=chromium:308400
TEST=./cbuildbot_commands_unittest.py

Change-Id: I98475a22e4d023a16b4521330ecff621a4869449
Reviewed-on: https://chromium-review.googlesource.com/173443
Commit-Queue: Bowgo Tsai <bowgotsai@chromium.org>
Tested-by: Bowgo Tsai <bowgotsai@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed