Problem reported by Ævar Arnfjörð Bjarmason in:
http://lists.gnu.org/archive/html/bug-gnulib/2017-05/msg00054.html
* lib/intprops.h: Do not include verify.h, and move compile-time
checks from here ...
* tests/test-intprops.c (main): ... to here, if they’re not here
already. Check widths of other standard integer types.
* modules/intprops (Depends-on): Remove ‘verify’.
Suggested by Eric Blake in:
http://lists.gnu.org/archive/html/bug-gnulib/2016-04/msg00016.html
* lib/intprops.h: Include <verify.h>. Verify that signed char,
short, int, long, and (if available) long long are two's complement.
* modules/intprops (Depends-on): Add 'verify'.