Changes to ghc

Changes to ghc:
commit dd02850975cb67678900d7cb4fddb1572c7cba24
Author: Johan Tibell <johan.tibell@gmail.com>
Date:   Fri Mar 28 09:21:10 2014 +0100

    PrimOps.cmm: whitespace only

    Harmonize the indentation amount. The file mixed 4, 2, and in some
    cases 3 spaces for indentation.