Unbreak FreeBSD build (hopefully).

BUG=v8:3548
LOG=y
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/556543004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23790 ce2b1a6d-e550-0410-aec6-3dcde31c8c00