This adds back the presubmit hook configuration file
for the ChromeOS build system / repo utility.
BUG=chrome-os-partner:18638
TEST=upload a change to gerrit without --no-verify
and see that repo does not complain about the license
headers anymore.
Change-Id: I82a31afaf2b01a77a2d09da49f5c7a6531dc7681
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/49772
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>