Changes to ghc

Changes to ghc:
commit 7f919dec1579641bbcd02978a0038c8a3723d8b7
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Wed Mar 12 11:15:16 2014 +0100

    Call Arity: Resurrect fakeBoringCalls

    (Otherwise the analysis was wrong, as covered by the new test case.)