GitLab

- mention chromium.clang tot waterfall
- linux cfi bot is now on luci

Bug: 731417
Change-Id: I01b4b01ac35741f66a63f23af78a09d9c1e83495
Reviewed-on: https://chromium-review.googlesource.com/1237113Reviewed-by: Nodir Turakulov <nodir@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592894}