Unbreak vtunejit=on.

BUG=v8:3288
LOG=y
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/254793002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20955 ce2b1a6d-e550-0410-aec6-3dcde31c8c00