Fix broken references to 'maintainers' attribute set.
haskell-QuickCheck: update to version 2.7.1
haskell-QuickCheck: jailbreak to that the test suite for 2.7.1 accepts its own library
haskell-tls: update to version 1.2.3
haskell-filepath: update to version 1.3.0.2
haskell-vty: update to version 4.7.5
haskell-wx: update to version 0.90.1.0
haskell-wxc: update to version 0.90.1.0
haskell-wxcore: update to version 0.90.1.0
haskell-wxdirect: update to version 0.90.1.0