Changes to ghc

Changes to ghc:
commit f9627252fc278ecaafbb1885c31adad7357c0763
Author: Austin Seipp <austin@well-typed.com>
Date:   Fri Feb 28 16:40:27 2014 -0600

    Note that we need Cabal-1.18 in the release notes

    Thanks to George Colpitts for helping us remember this!

    Signed-off-by: Austin Seipp <austin@well-typed.com>