sign_official_build: loem support for firmware

In order to support signing firmwares with loem keys, support taking in
the firmware bundle unpacked.

BUG=b:339024336
TEST=None
BRANCH=None

Signed-off-by: Benjamin Shai <bshai@google.com>
Change-Id: Ibf4c1921599c1853415232eced26bd23f16d49ec
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/5519148
Reviewed-by: Julius Werner <jwerner@chromium.org>
1 file changed