Changes to ghc

Changes to ghc:
commit ed2a8f07a7b77f72682fc57b54908f30eb4b7c33
Author: Johan Tibell <johan.tibell@gmail.com>
Date:   Thu Mar 13 18:10:41 2014 +0100

    Improve copy/clone array primop docs

    Clarify the order of the arguments. Also, remove any use of # in the
    comments, which would make the rest of that comment line disappear in
    the docs, due to being treated as a comment by the preprocessor.