Build fix.

We should better initialize the random state even for non-snapshot
builds...

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/77773004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17962 ce2b1a6d-e550-0410-aec6-3dcde31c8c00