firmware_builder: add builder script to build everything

Until we have CQ support, we should all call the following before
uploading a change:

`firmware_builder.py build && firmware_builder.py test`

The CQ will eventually use this file as well for the tot fw builder CQ
support.

BUG=b:172512307
TEST=run build and test sub commands

Cq-Depend: chromium:2540732
Change-Id: I40f843b25063b0a0d06ad50780352ceb66673d73
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/zephyr-chrome/+/2541163
Tested-by: Jett Rink <jettrink@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Jett Rink <jettrink@chromium.org>
1 file changed