Only pass provide_feeds in Buildbot 0.8.4p1.
Only pass provide_feeds in Buildbot 0.8.4p1.

BUG=79195
TBR=bradnelson@chromium.org

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@90278 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build