patch applied (cabal): Rewrite rawSystemStdout to not use runInteractiveProcess with ghc

[Duncan Coutts]

Fri Jan 25 09:55:17 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Rewrite rawSystemStdout to not use runInteractiveProcess with ghc
  So it doesn't use a temp file to capture the output.
  Since runInteractiveProcess is only available on ghc we
  use the temp file method for other implementations.

    M ./Distribution/Simple/Utils.hs -35 +30