Re-generate Haskell packages with cabal2nix.
haskell-stylish-haskell: update to version 0.5.10.1
haskell-parsers: switch to version 0.12
haskell-HUnit-approx: add version 1.0
haskell-github-backup: update to version 1.20140721
haskell-ChasingBottoms: update to version 1.3.0.8
haskell-MFlow: update to version 0.4.5.5
haskell-cgrep: update to version 6.4.4
haskell-cmdargs: update to version 0.10.8
haskell-ekg-carbon: update to version 1.0.1
haskell-focus: update to version 0.1.2
haskell-gdiff: update to version 1.1
haskell-generic-aeson: update to version 0.1.1.1
haskell-haskell-token-utils: update to version 0.0.0.4
haskell-hcltest: update to version 0.3.3
haskell-highlighting-kate: update to version 0.5.8.5
haskell-hspec-expectations: update to version 0.6.0.1
haskell-hspec-meta: update to version 1.11.0
haskell-hspec: update to version 1.11.0
haskell-hspec2: update to version 0.4.0