Re-generate Haskell packages with cabal2nix.
haddock-2.14.3: enable test suite

https://github.com/NixOS/cabal2nix/pull/86
haskell-cabal2nix: update to version 1.69
haskell-taffybar: update to version 0.4.1
haskell-GLUtil: update to version 0.8.1
haskell-MonadRandom: update to version 0.2
haskell-aws: update to version 0.10.3
haskell-cabal-cargs: update to version 0.7.1
haskell-compdata: update to version 0.9
haskell-gitit: update to version 0.10.5
haskell-hplayground: update to version 0.1.0.3
haskell-hsimport: update to version 0.5.1
haskell-lifted-async: update to version 0.2.0.2
haskell-rest-core: update to version 0.32
haskell-rest-gen: update to version 0.14.2.1
haskell-rest-happstack: update to version 0.2.10.1
haskell-rest-snap: update to version 0.1.17.13
haskell-rest-types: update to version 1.10.2
haskell-rest-wai: update to version 0.1.0.3
haskell-shelly: update to version 1.5.5