contrib: add some common helper scripts

A few tools want a limited set of helper scripts, so add them here.

BUG=None
TEST=None

Change-Id: I63afdf2b11a8ab741422a4f09061d0507aab4063
Reviewed-on: https://chromium-review.googlesource.com/1178330
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
2 files changed