update_program_fw: Add --bug and attribution Add --bug and autogenerate attribution to commit message. BUG=none TEST=regenerate puff f/w configs. Change-Id: I85bb190cecd0e5b5f893ad4064dd50cfa2e7eaf7 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2265706 Tested-by: Andrew McRae <amcrae@chromium.org> Auto-Submit: Andrew McRae <amcrae@chromium.org> Commit-Queue: Sam McNally <sammc@chromium.org> Reviewed-by: Sam McNally <sammc@chromium.org>