Implement macro assembler operations PrepareCallCFunction and CallCFunction like on both Intel platforms. Used these for direct calls to C functions.
Review URL: http://codereview.chromium.org/1549031

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4374 ce2b1a6d-e550-0410-aec6-3dcde31c8c00