patch applied (cabal): Delete rawSystemPathExit, use rawSystemExit

[Duncan Coutts]

Sat Jan 26 15:56:20 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Delete rawSystemPathExit, use rawSystemExit
  There was only one use and no point since rawSystem uses the path anyway.

    M ./Distribution/Simple.hs -2 +2
    M ./Distribution/Simple/Utils.hs -11 +2