Add more builders to blacklist to //testing/buildbot/manage.py.

This is to help the automation of converting tests to be isolated and run on
Swarming instead of locally.

R=jam@chromium.org
BUG=98637

Review URL: https://codereview.chromium.org/1166993003

Cr-Commit-Position: refs/heads/master@{#333106}
1 file changed