Temporarily disable CollectCpuProfile on MIPS, it doesn't work in the simulator

TBR=yurys@chromium.org
BUG=v8:2621

Review URL: https://codereview.chromium.org/14009005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14222 ce2b1a6d-e550-0410-aec6-3dcde31c8c00