Enable TurboFan deopts for test-heap/NextCodeLinkIsWeak.

R=jarin@chromium.org
TEST=cctest/test-heap/NextCodeLinkIsWeak

Review URL: https://codereview.chromium.org/500973002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23370 ce2b1a6d-e550-0410-aec6-3dcde31c8c00