Exclude offline bots from CQ config.
Exclude offline bots from CQ config.

To unblock the CQ, let's remove these bots until they're
back.

BUG=chromium:550814
TBR=phoglund@webrtc.org

Review URL: https://codereview.webrtc.org/1420283013 .

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#10489}

TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc