Changes to ghc-prim(2)

Changes to ghc-prim:
commit 8822cfce44a3197f6f418563723c9cc4760e8db9
Author: Austin Seipp <austin@well-typed.com>
Date:   Fri Oct 25 09:33:49 2013 -0500

    Add actual documentation for new SPEC type.

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

commit df7661a6ba9b44aa047817c907070e4d0af11337
Author: Austin Seipp <austin@well-typed.com>
Date:   Fri Oct 25 06:13:55 2013 -0500

    Implement SPEC for SpecConstr as a built in type.

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