Using two flags to specify the state of targets:
1) FixupIsPCRelative specifies where to patch (relative to pc or at pc);
2) FixupUseCodeObject specifies what to patch (code object or start address).

Review URL: http://codereview.chromium.org/10233

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@727 ce2b1a6d-e550-0410-aec6-3dcde31c8c00