Pylint-1.7+ include a score report by default at the end of every
module lint.  We disable reports in general, so silence this too.

Bug: 866772
Change-Id: Ie3df44c80b90daa59e46c8fd37a949176c9b09a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1770420Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>