patch applied (ghc): Use cabal information to get GHC's flags to `ghctags'.

[Thomas Schilling]

Mon Oct 13 10:06:58 PDT 2008  Thomas Schilling <nominolo at googlemail.com>
  * Use cabal information to get GHC's flags to `ghctags'.
  
  By giving the dist-directory to ghctags we can get all the GHC API
  flags we need in order to load the required modules.  The flag name
  could perhaps be improved, but apart from that it seems to work well.

    M ./utils/ghctags/GhcTags.hs -55 +116

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20081013170658-7c5c6-87a2fc0b22bb58daff2711144fbd4bdc484d1897.gz