ignore generated files

BUG=None
TEST=`git status` is happy

Change-Id: I5ef41d12f160edea73f44283186c867d016d22a0
Reviewed-on: https://chromium-review.googlesource.com/378778
Reviewed-by: Dominik Behr <dbehr@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed