Changes to ghc

Changes to ghc:
commit 7602bd4de901e4304a3a45dca08fc630d1bb5bf2
Author: Richard Eisenberg <eir@cis.upenn.edu>
Date:   Fri Mar 14 15:03:21 2014 -0400

    Remove code reporting issues with Safe Haskell and coerce.

    This is a followup to the fix for #8827, and should be merged
    with that change.