image_signing: emit required_dmparams_regex in case of mismatch

BRANCH=none
TEST=none
BUG=none

Change-Id: Iece5272622467829050ca50a4842ef771addf7ae
Reviewed-on: https://chromium-review.googlesource.com/267739
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Amey Deshpande <ameyd@google.com>
Tested-by: Amey Deshpande <ameyd@google.com>
1 file changed