Fix scoping of function declarations in eval inside non-trivial local scope

R=mstarzinger@chromium.org
BUG=v8:2594

Review URL: https://codereview.chromium.org/22901010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16286 ce2b1a6d-e550-0410-aec6-3dcde31c8c00