The Chicken 3.15 tarball, when ./configured on Cygwin, creates a
directory lib/chicken/1 with nothing in it. What is this for, and is
this behavior correct? I'm guessing it's for eggs, and "1" strikes me
as a rather odd version number, but maybe that's what it's supposed to
be. Anyways, tell me what's supposed to be happening so I can duplicate
it for CMake.