Fix build failures with LLVM-GCC 4.2 on Mac (again).

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/431633002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22718 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix more XCode build problems.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/425283002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22719 ce2b1a6d-e550-0410-aec6-3dcde31c8c00