haskell-folds: mark as broken

https://github.com/NixOS/nixpkgs/issues/3526
haskell-epic: mark as broken

https://github.com/edwinb/EpiVM/issues/6
haskell-ghc-syb: don't build on Hydra

Requires GHC >= 6.10 aand < 6.14
haskell-rest-types: jailbreak (aeson)

https://github.com/silkapp/rest/issues/57