patch applied (packages/Cabal): Substitute for $topdir when we read GHC's InstalledPackageInfo's

[Ian Lynagh]

Wed Jul 23 04:22:32 PDT 2008  Ian Lynagh <igloo at earth.li>
  * Substitute for $topdir when we read GHC's InstalledPackageInfo's

    M ./Distribution/Simple/GHC.hs -3 +30

View patch online:
http://darcs.haskell.org/packages/Cabal/_darcs/patches/20080723112232-3fd76-7371e4b3976d9a2b86bdacc3d58f4f6fc0024d07.gz