image_signing: make_dev_ssd.sh: convert to info/error helpers

This makes the output easier to follow when multiple scripts are being run.

BRANCH=None
BUG=chromium:714598
TEST=signing images still works

Change-Id: I96e20f38b6a51ad4dc8064fa3fb3d4302c47888f
Reviewed-on: https://chromium-review.googlesource.com/497302
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: David Riley <davidriley@chromium.org>
1 file changed