Changes to ghc

Changes to ghc:
commit f48463ea4f56252767444aa96e40f2784f236122
Author: Edward Z. Yang <ezyang@cs.stanford.edu>
Date:   Tue Jul 1 20:02:18 2014 +0100

    Finish the simple elaboration algo

    Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>