image_signing: unify output helpers
We have `err_die` and `die` helpers that do the same thing, but some
scripts just have to know which one to use based on their runtime.
Just unify them as the more common `die` so all scripts can use it.
Similarly, we provide info, warn, and error to dev scripts, but not
to the runtime ones. Add small stubs in common_minimal.sh so the
API is consistent.
BRANCH=None
BUG=chromium:718184
TEST=scripts still work
Change-Id: Id44fb27900c37f4e357d20817f909e4534d1c5b3
Reviewed-on: https://chromium-review.googlesource.com/507990
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: David Riley <davidriley@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
6 files changed
