Revert 7634, Fix experimental.gyp to include i18n-empty-js.cc so that js2c.py get correct parameters.

This caused all chromium based builds to fail (e.g., DumpRenderTree)
Review URL: http://codereview.chromium.org/6882003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7643 ce2b1a6d-e550-0410-aec6-3dcde31c8c00