X64 Crankshaft: Add addition of tagged and int32 values to Crankshaft on x64.  Enable CallIC to global function to call optimized code.
Review URL: http://codereview.chromium.org/6329006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6366 ce2b1a6d-e550-0410-aec6-3dcde31c8c00