hackage-packages.nix: update Haskell package set

This update was generated by hackage2nix v20160613-12-g1145e86 using the following inputs:

  - Hackage: https://github.com/commercialhaskell/all-cabal-hashes/commit/8b1e5923b5f2d5a438f8936ecfc8ef4d39782004
  - LTS Haskell: https://github.com/fpco/lts-haskell/commit/1c63caa7b8636d6096141d19ed5fb9becd89ce8d
  - Stackage Nightly: https://github.com/fpco/stackage-nightly/commit/39da79acedd8aaa9d22fb962825f7ebc27a25585