zephyr: add kohaku project to firmware-zephyr-cq

Make Kohaku build as critical for CQ runs.

BUG=b:177609422
TEST=firmware_builder.py --metrics=$(mktemp -d) build

Change-Id: Ib076abc7135f04dcef04e5a4b0d994e1b7c602bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/zephyr-chrome/+/2634279
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Auto-Submit: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed