Stop "cooking" targets of jumps and calls in code objects.  Do not convert jump and call targets to absolute pointers to Code objects during GC, heap verification, and serialization.
Review URL: http://codereview.chromium.org/203070

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2941 ce2b1a6d-e550-0410-aec6-3dcde31c8c00