Changes to ghc(3)

Changes to ghc:
commit eec0b58f6cd9638406d9209aed48486ede4965f5
Author: Simon Marlow <marlowsd@gmail.com>
Date:   Thu Jan 16 11:10:01 2014 +0000

    bump bounds for T6048

    Presumably broken by an earlier change, anyone know which one?

commit 78a506a914f18399c8d5032fe72547b6c2abfc7a
Author: Simon Marlow <marlowsd@gmail.com>
Date:   Mon Jan 13 20:36:48 2014 +0000

    Documentation on the stack layout algorithm

commit f0a7261a39bd1a8c5217fecba56c593c353f198c
Author: Simon Marlow <marlowsd@gmail.com>
Date:   Mon Jan 13 20:07:19 2014 +0000

    Disable -fregs-graph (#7679, #8657)