LICENSE: add missing file

Every repo needs to explicitly declare this.

BUG=None
TEST=CQ passes

Change-Id: I2d08575ebabe68df1825b968806548a12e1438fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/drm-tests/+/2169382
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed