patch applied (cabal): Make getInstalledPackages use ProgramConfiguration rather than Compiler

[Duncan Coutts]

Tue Aug 28 18:35:18 PDT 2007  Duncan Coutts <duncan at haskell.org>
  * Make getInstalledPackages use ProgramConfiguration rather than Compiler
  These should be moved into the GHC and JHC modules, possibly with some
  unifying version if that make sense.

    M ./Distribution/Simple/Configure.hs -21 +17
    M ./Distribution/Simple/SetupWrapper.hs -10 +13