cvetriager: update on copyright header

Updated the copyright header for every file it was missing in.

BUG=chromium:1093363
TEST=python setup.py test

Change-Id: I11b1c458f47ed00c78769d5403d8d0b96bddeb02
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2283263
Reviewed-by: Zubin Mithra <zsm@chromium.org>
Commit-Queue: Wanda Mora <morawand@chromium.org>
Tested-by: Wanda Mora <morawand@chromium.org>
8 files changed