sign_official_build: add cloud-signing param

Adds the `--cloud-signing` parameter to script to support new flow.
This parameter is currently unused, but should be used by signing
scripts that switch over to the Cloud KMS flow.

BUG=b:256867824
TEST=./sign_official_build.sh base foo ./ bar baz --cloud-sigining
BRANCH=none
Signed-off-by: George Englebrecht <engeg@google.com>

Change-Id: Ie62fb26dfe3c651744b43e430a0b0c9f129af67a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/4630329
Commit-Queue: Benjamin Shai <bshai@google.com>
Tested-by: Benjamin Shai <bshai@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed