V8 Buildbot: Redistribute builder slaves.
V8 Buildbot: Redistribute builder slaves.

Interchanging slaves for builders are wasting more time than
they win.

TBR=kjellander@chromium.org

Review URL: https://codereview.chromium.org/799933002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@293374 0039d316-1c4b-4281-b951-d872f2087c98

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