I made a F19 test repo for ghc-7.6.3.x86_64. http://repos.fedorapeople.org/repos/petersen/ghc-7.6.3/ I am still waiting for a new Haskell Platform which should happen soon hopefully before moving to build ghc-7.6.3 in Rawhide.
HP-2013.2 RC1 is out and I have now added it to the repo. So cabal-install, libs, etc are now available.
The next step is to test rebuilding (and updating) the rest of the packages against ghc-7.6.3 and HP-2013.2
Jens