patch applied (ghc): Complain more loudly if any of the hsc2hs phases fail

[Simon Marlow]

Mon Jul  3 16:43:56 PDT 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
  * Complain more loudly if any of the hsc2hs phases fail
  previously hsc2hs just exits with a non-zero exit code, now if any of
  the compilation, linking or runing phases fail then we get a message
  saying so and the failing command is printed.

    M ./utils/hsc2hs/Main.hs -23 +17