Expect broken by new TCL import

[Michael Elizabeth Chastain]

Daniel J writes:
> This means existing build directories probably need to be cleaned
> pretty thoroughly.  The beauty of the new toplevel configury: it's as
> simple as rm -rf expect, make all-expect.  Now it works.

Ah, that is a blind spot in my coverage, I build in virgin directories
nearly all the time, so I don't find problams like this.

Also I checkout "gdb" and "dejagnu" separately, not "gdb+dejagnu",
so that's another set of code paths that never hit my test bed.

Michael C