Fix copyright dates of new test files per Shabi Bug: b/181711029 Change-Id: Ie619ba90f699dd8234cf185198cb6eeac9142758 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2780560 Reviewed-by: Ian Elliott <ianelliott@google.com> Commit-Queue: Ian Elliott <ianelliott@google.com>