* tests/test-mbsnrtoc32s.c: New file, based on tests/test-mbsnrtowcs.c.
* tests/test-mbsnrtoc32s-1.sh: New file, based on
tests/test-mbsnrtowcs1.sh.
* tests/test-mbsnrtoc32s-2.sh: New file, based on
tests/test-mbsnrtowcs2.sh.
* tests/test-mbsnrtoc32s-3.sh: New file, based on
tests/test-mbsnrtowcs3.sh.
* tests/test-mbsnrtoc32s-4.sh: New file, based on
tests/test-mbsnrtowcs4.sh.
* modules/mbsnrtoc32s-tests: New file, based on
modules/mbsnrtowcs-tests.