Change Cabal's GHC support window to GHC 6.12 or later#3111

Merged

23Skidoo merged 1 commit intohaskell:masterfrom ezyang:cabal-window-to-6-12

Mar 6, 2016

+31-167

Commits on Mar 5, 2016

Remove support for versions of GHC prior to 6.12, fixes haskell#3108 .
ezyang
committed