This puts us very close to being able to compile the empty function.

This changes only has a small number of 64 bit specific assembler instructions.

The remaining changes are much more platform specific and will go in another change.

Review URL: http://codereview.chromium.org/6247005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6306 ce2b1a6d-e550-0410-aec6-3dcde31c8c00