patch applied (cabal): Convert a couple uses of read/reads in the GHC module

[Duncan Coutts]

Mon Mar 24 12:10:26 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Convert a couple uses of read/reads in the GHC module
  Read the ghc --supported-languages list using simpleParse rather than
  reads. It now parses extensions that GHC recognises but Cabal does
  not as (UnknownExtension theExtensionName). For example this allows
  people to use the PArr extension which ghc currently supports but
  which is not a finalised registered extension.

    M ./Distribution/Simple/GHC.hs -12 +21

View patch online:

  http://darcs.haskell.org/cabal/_darcs/patches/20080324191026-adfee-d1dc812ab8c626a7ccaaa15b411e85502f5b2030.gz