It will go in a separate tarball and be consumed by the codesearch buildbot.
Getting built by default in update.py also means our ToT bots will catch any
breakages due to upstream changes in clang.
BUG=724686
Review-Url: https://codereview.chromium.org/2896663002
Cr-Original-Commit-Position: refs/heads/master@{#474576}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 2aa36cd3f1ae44ee75d549304bdf568798528917
hans