bug#9750: 24.0.90; Windows binary distribution build fails with 24.0.90 Pretest

[Stefan Monnier]

> It seems this change was made over a year ago, but a few months later
> make-dist was changed to explicitly exclude this file. The question mark
> on the end of the comment seems to indicate that the author of the
> change wasn't sure at the time if it was the right thing to do.

Please just move the file to `nt', and rework the first few sentences to
make it clear in which context it is meant to be used.


        Stefan