Run network service tests and site isolation tests on the linux clang tot bots.

They run on the main waterfall, so they should run on the clang/tot bots as well.

Bug: 843511
Change-Id: I6fe7256c741d224c090fb38074fe98ff07353149
Reviewed-on: https://chromium-review.googlesource.com/1091071
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565340}
3 files changed