Add linux_blink_oilpan_rel to the Chromium CQ.
Add linux_blink_oilpan_rel to the Chromium CQ.

This moves it from a 50% experimental to full member.
It looks like we have plenty of capacity and the bot
should be stable; recent failures seem due to an
unrelated infra issue (crbug.com/552587).

R=sergeyberezin@chromium.org
TBR=phajdan.jr@chromium.org
BUG=387516

Review URL: https://codereview.chromium.org/1431953002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#358479}

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