Fix error in optimized x.apply(y, arguments) code generation on ARM.  Fixes issue 784.  Adds regression test.
Review URL: http://codereview.chromium.org/3048035

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5144 ce2b1a6d-e550-0410-aec6-3dcde31c8c00