Changes to ghc

Changes to ghc:
commit 702fb1ddf44256d5b03cc81164606f0b5beb31e5
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Fri Mar 14 11:13:39 2014 +0100

    Update to containers-0.5.5.1

    This fixes a wrong #if around role annotations (see #8718)

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
    (cherry picked from commit df265b95a2f3640425b43b17993b9ec78a287f60)