Unable to compile IcedTea with CACAO under Fedora 17

[Stefan Ring]

> It's not disabled for speed, though, but because the configure script
> complained about these. Or should I say, the configure script used to
> complain many versions ago, and I have not bothered taking them out
> since... ;). I'll try to find out if they are still necessary.

I've removed all of the --disable-system- switches now, and it makes
absolutely no difference in build time.

KR