We add the bot via the post-upload step, that's good enough

R=machenbach@chromium.org,tandrii@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I8d582d101b4d2f308829da75df56e04a3dabadbf
Reviewed-on: https://chromium-review.googlesource.com/518114Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45594}