Changes to ghc(2)

Changes to ghc:
commit 762e083ca29c3aaef6d85b786c9cfeac500e1ddf
Author: Austin Seipp <austin@well-typed.com>
Date:   Mon Apr 7 16:26:42 2014 -0500

    Set VERSION=7.8.1, RELEASE=YES

    Signed-off-by: Austin Seipp <austin@well-typed.com>

commit 48bf40d4faeeaf92d2def41fd9c4c5e6fa8f66ea
Author: Austin Seipp <austin@well-typed.com>
Date:   Mon Apr 7 16:25:50 2014 -0500

    Update ANNOUNCE for GHC 7.8.1

    Signed-off-by: Austin Seipp <austin@well-typed.com>