Changes to ghc

Changes to ghc:
commit 289ecda3d4bd3073b37cfdcccce02ad53962ea0d
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Tue Dec 10 09:31:40 2013 +0100

    Add more .mailmap entries

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>