Version 3.28.71.6 (merged r23552)

Add mapping of test groups to test driver.

TBR=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/529703002

git-svn-id: https://v8.googlecode.com/svn/branches/3.28@23553 ce2b1a6d-e550-0410-aec6-3dcde31c8c00