PATCH: dg-require-{fork,mkfifo} for V3 testsuite

[Paolo Carlini]

Mark Mitchell wrote:

> I didn't know how general this effective-target stuff was becoming;
> that's very cool.  I'm going to (lazily!) leave the current version
> alone until/unless you ask me to fix it -- but if you do ask me, I'll
> be happy to do it.

Well, I'm going to work soon - probably before the end of the week - on
the named locales case. If you could generalize the thing a bit as
suggested by Loren would be great, otherwise, no problem, we can tidy
the whole machinery afterward, and I will simply add
dg-require-namedlocale for now.

Thanks,
Paolo.