patch applied (cabal-install): Fixed imports to correspond to the latest arrangement of Distribution.PackageDescription.

[Duncan Coutts]

Sat Feb  9 23:07:30 PST 2008  phigley at gmail.com
  * Fixed imports to correspond to the latest arrangement of Distribution.PackageDescription.

    M ./Hackage/Config.hs -1 +1
    M ./Hackage/Dependency.hs -2 +3
    M ./Hackage/Install.hs -1 +1
    M ./Hackage/RepoIndex.hs -1 +1
    M ./Main.hs -2 +1