update for EPEL6 to ghc-7.0.4 in testing

[Jens Petersen]

> I am pleased to announce a refresh of the Haskell packages for EPEL-6
> is now available in testing.  The major changes are:
> 
> - ghc-6.12.3 -> ghc-7.0.4
> - Haskell Platform updated to 2011.4
> - xmonad updated to 0.10
> - darcs updated to 2.5.2
> - gtk2hs packages to 0.12.2

This has now been pushed to stable, bringing the EPEL6
in line with the Haskell support in F17.  You should be
able to build packages now for EL6 - let me know if you
need help with importing and building missing deps.

Thanks, Jens