hackage-packages.nix: update to...

hackage-packages.nix: update to https://github.com/commercialhaskell/all-cabal-hashes/commit/d2f0ba57b0b22a42909a66bfdab6aeedca3b0f53 with hackage2nix v20150807-40-g9d40586

Notable updates changes include:

 - vector: update to version 0.11.x
 - errors: update to version 2.x