Fix bailout ID for nullary arrow function literals

The FunctionState corresponding to the arrow function's body should be
torn down before the function literal is allocated, so that the function
literal gets a bailout id for the environment in which it appears.

We will also need to rewind bailout IDs in the environment of the
function literal, to return IDs allocated for arrow function arguments.
This will come in the next patch.

R=rossberg@chromium.org
BUG=v8:3475
LOG=N

Review URL: https://codereview.chromium.org/442573004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22885 ce2b1a6d-e550-0410-aec6-3dcde31c8c00