math/hs-Agda: Allow to build with QuickCheck 2.6 and hashable 1.1
www/hs-snap: 0.11.2.2 --> 0.11.3.1
www/hs-yesod-platform: Fix dependency on hashable
devel/hs-haskell-platform: Fix dependency on OpenGL
www/hs-activehs: Allow to build with QuickCheck 2.6 and syb 0.4
devel/hs-testpack: Fix build with QuickCheck 2.6