wdt_util: Fix copyright header for arm platform

BUG=None
TEST=CQ

Change-Id: Iad381a3da3cc23aa9b64922873832bec5a54a99a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/5085648
Tested-by: Henry Barnor <hbarnor@chromium.org>
Auto-Submit: Henry Barnor <hbarnor@chromium.org>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: ChromeOS Auto Retry <chromeos-auto-retry@chromeos-bot.iam.gserviceaccount.com>
2 files changed