Providing --package flag allows recipes.py to skip git calls it makes
to find repo root.
Bug: b/323243527
Change-Id: If507fbf15459d7ea73670df202e16c344f9467a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5263441
Commit-Queue: Gavin Mak <gavinmak@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>