patch applied (packages/array): Improve the .cabal file

[Ian Lynagh]

Tue Mar 25 08:36:14 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Improve the .cabal file
  Specify the build-type and min cabal-version.
  Don't have Data.Array in both exposed-modules on both sides of a
  conditional, just make it unconditional.
  Stop using -fglasgow-exts and specify all the extensions explicitly.
  Some extensions are conditional on non-nhc98 and some are ghc-specific.

    M ./array.cabal -8 +19