nightly build nofib failures

[Simon Marlow]

> There is a bug in the nightly build scripts for running the nofib
> suite. Nofib programs can fail, yet the build output will still
> be "ok.". In fact, every single nofib program can fail to
> compile, but it will still be "ok." in the nightly mail.
> 
> In a normal nightly build, we get this kind of output for
> a nofib run:
>     "**** running nofib                ... ok."
> Taking
>     http://www.haskell.org/pipermail/cvs-ghc/2003-July/017999.html
> as an example, we see that all nofib's were "ok". Now, if we go
> and look at the logs:
>     http://haskell.cs.yale.edu/ghc/dist/current/logs/
> 
> Looking in nofib-2, we see that there are lots (all?) fails: primes, 
> queens, etc.  Looking in nofib-5 all tests fail, because it
> is build the -unreg way witout library support. 
> 
> So here is a quick sh patch against nightly/bin/nightly-wrk to
> print the number of failures a nofib run produced. It produces
> output like this, where failures are printed if they occur.
> 
>     **** running nofib                ... ok.
>     **** running nofib                ... ok.
>     **** running nofib                ... ok. (4 failures)
>     **** running nofib                ... ok. (4 failures)

Committed, thanks!

Cheers,
	Simon