Turn on parallel recompilation for tests that assert optimization status.

R=mvstanton@chromium.org
BUG=

Review URL: https://codereview.chromium.org/19807002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15793 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Prepare push to trunk.  Now working on version 3.20.8.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/19933002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15794 ce2b1a6d-e550-0410-aec6-3dcde31c8c00