V8 buildbot: Don't run sputnik on 2.5 and 3.0 branches on arm simulator.
V8 buildbot: Don't run sputnik on 2.5 and 3.0 branches on arm simulator.

The test harness is not compatible with the current version of sputnik
Review URL: http://codereview.chromium.org/6905023

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@82988 0039d316-1c4b-4281-b951-d872f2087c98

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