Changes to ghc

Changes to ghc:
commit b735883016b946372cb44b6c5d86dc36c126a8cf
Author: Reid Barton <rwbarton@gmail.com>
Date:   Mon Jun 30 22:01:57 2014 -0400

    Avoid integer overflow in hp2ps (#9145)

    This is slightly hackish, but hp2ps is already convoluted enough
    that I don't feel bad about it.