Changes to ghc(2)

Changes to ghc:
commit b4eb630c7480bc56c673a463f274aec18e237e8c
Author: Austin Seipp <austin@well-typed.com>
Date:   Thu Feb 6 22:58:30 2014 -0600

    Remove ios_HOST check for GCTDecl.h

    Following 298a25bdf and #8722 as Peter mentioned, this probably isn't
    needed anymore.

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

commit 298a25bdfd02bb591fde2dd0590bd7af81a91b94
Author: Peter Trommler <ptrommler@acm.org>
Date:   Thu Feb 6 22:57:34 2014 -0600

    Fix __thread detection (#8722)

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