CRAS: Fix header for repo check

Add "OS", remove (c)

BUG=chromium:950858
TEST=Run repo check

Change-Id: Ib8383debb3a3c2c88de734b6b22a44dfea500ffa
Reviewed-on: https://chromium-review.googlesource.com/1669666
Tested-by: En-Shuo Hsu <enshuo@google.com>
Commit-Ready: En-Shuo Hsu <enshuo@google.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
10 files changed