Move various files that are only checked out for certain modules into

Move various files that are only checked out for certain modules into
the *_these_too lists before the check for existence of the items of those
lists.

Apply "sort -u" to the *_these_too lists to keep Sanitize from complaining
when it can't delete COPYING.NEWLIB twice.

I'm not convinced the right thing will be done with COPYING.NEWLIB when
keep-cygnus or keep-newlib (but not both) is supplied; that's unchanged.