Merge pull request #1165 from benmachine/haddockattributes

Two more Haddock module attribute syntax updates

cabal-install/Distribution/Compat/Exception.hs

@@ -2,7 +2,7 @@
 {-# OPTIONS_GHC -cpp #-}
 {-# OPTIONS_NHC98 -cpp #-}
 {-# OPTIONS_JHC -fcpp #-}
--- #hide
+{-# OPTIONS_HADDOCK hide #-}
 module Distribution.Compat.Exception (
   SomeException,
   onException,

cabal-install/Distribution/Compat/FilePerms.hs

 {-# LANGUAGE CPP #-}
--- #hide
+{-# OPTIONS_HADDOCK hide #-}
 module Distribution.Compat.FilePerms (
   setFileOrdinary,
   setFileExecutable,