Add newline-eof to warnings Bug: angleproject:4757 Change-Id: I8ff6cb1277bf31ed8d6af667aa59ab8029633fe0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2247488 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>