Changes to ghc

Changes to ghc:
commit 5a392ca14b3698d1be5166dd7a6a40b268e948e5
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Fri May 30 10:04:10 2014 +0200

    Disable FixEither tests in TcCoercible

    This fixes #9153. It has not been noticed before because this
    TcCoercible does not run with "make fast=YES"