pre-upload: Exclude OWNERS files from license checks.

BUG=None
TEST=pre-upload_unittest.py passes

Change-Id: I37f53cce53bae365963b8a33c3081a4d9748bddd
Reviewed-on: https://chromium-review.googlesource.com/908177
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Ken Turner <kennetht@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
2 files changed