HEAD segfaulting

[Simon Marlow]

> -----
> GhcUnregisterised=YES
> SplitObjs=NO
> 
> GhcCompilerWays =
> 
> SRC_HC_OPTS   = -H32m -O0
> GhcHcOpts     = -Rghc-timing -DDEBUG
> GhcLibHcOpts  = -O -dcore-lint -keep-hc-files
> GhcLibWays    =
> 
> # Debugging RTS
> GhcRtsHcOpts = -optc-DDEBUG
> GhcRtsCcOpts = -g
> SRC_HC_OPTS  += -lbfd -liberty
> -----
> 
> Without the above it looks like I get a working GHC.

Now fixed, I believe.  The key point was that the compiler was compiled
without -O, which we don't normally do in the nightly builds.  Knowing
that, I could reproduce it easily.

Please try with the fix and let me know if it helps (it works here).

Cheers,
	Simon