patch applied (packages/Cabal): Remove some more ghc pre-6.4 support and common up some showPackageId uses

[Ian Lynagh]

Fri Feb 22 09:42:27 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Remove some more ghc pre-6.4 support and common up some showPackageId uses

    M ./Distribution/Simple/GHC.hs -22 +13

View patch online:
http://darcs.haskell.org/packages/Cabal/_darcs/patches/20080222174227-adfee-f9294443ed8a815d380cef8ed8abc2c758be6605.gz