Mark TranscendentalCacheSSE2Stub as allowing internal stub calls.  Mark pextrd instruction as requiring SSE 4.1.
Review URL: http://codereview.chromium.org/5901001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6033 ce2b1a6d-e550-0410-aec6-3dcde31c8c00