[toolchain-utils] Update rotating tester to allow GCC tests, too.

BUG=None
TEST=Tested on chrotomation2 with role account.

Change-Id: I232df188f05a13cdc59a53173b7c46f9b1b1b282
Reviewed-on: https://chrome-internal-review.googlesource.com/266966
Commit-Ready: Caroline Tice <cmtice@google.com>
Tested-by: Caroline Tice <cmtice@google.com>
Reviewed-by: Luis Lozano <llozano@chromium.org>
1 file changed