GitLab

The PGO builds aren't supposed to use Clang.

BUG=709690

Change-Id: I76ab708d2f187d5c6b8f59d3c46979dd27da17b7
Reviewed-on: https://chromium-review.googlesource.com/594636Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490806}