This is modeled after tools/android-run.py. It is meant to be used
as a --command-prefix argument to tools/run-tests.py

BUG=2614

Review URL: https://codereview.chromium.org/13619011
Patch from Brad Chen <bradchen@google.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14177 ce2b1a6d-e550-0410-aec6-3dcde31c8c00