tools: Fix license header

BUG=none
TEST=Check repo --verify is not complaining anymore.

Change-Id: Ia90fced35f679a52c76c78ad4a2ab80fce0ce64e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/4300260
Reviewed-by: Harry Cutts <hcutts@chromium.org>
Code-Coverage: Harry Cutts <hcutts@chromium.org>
Commit-Queue: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
4 files changed