top-level removal of dejagnu, expect

[DJ Delorie]

> The obvious reason to remove such support is to reduce the amount of
> stuff to maintain.  If having top-level build support for expect and
> dejagnu is important to Red Hat, can't Red Hat maintain local patches?

We could, hence I said "I prefer".  We have support for many packages
that aren't in src (dosutils? hello? there's a huge list of packages
in Makefile.def).  Maintenance is a single line in Makefile.def, not
really a compelling argument.

A minor argument against the change is that it's not needed yet, I'd
think for such a major change we'd want to do the least change needed
until the change has proven itself.  It seems to me that the toplevel
stuff is cleanup, not prep.