patch applied (cabal): Add data Platform = Platform Arch OS

[Duncan Coutts]

Tue Aug 12 09:09:41 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Add data Platform = Platform Arch OS
  Since we tend to pass them around together rather a lot.
  Also add a Text instance with a format like "i386-linux"

    M ./Distribution/System.hs +25

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080812160941-adfee-3690e2bdeaa476783eec4f7388bc06e4ce325441.gz