We need this for the bots to be functional in client.webrtc.fyi.
Right now they're not really working since runhooks no longer runs GYP
(nor GN), and the MB step is not yet enabled in this waterfall.
BUG=webrtc:6287
NOTRY=True
Review-Url: https://codereview.webrtc.org/2312733002
Cr-Commit-Position: refs/heads/master@{#14070}