* tests/test-c32stombs.c: New file, based on tests/test-c32srtombs.c.
* tests/test-c32stombs-1.sh: New file, based on
tests/test-c32srtombs-1.sh.
* tests/test-c32stombs-2.sh: New file, based on
tests/test-c32srtombs-2.sh.
* tests/test-c32stombs-3.sh: New file, based on
tests/test-c32srtombs-3.sh.
* tests/test-c32stombs-4.sh: New file, based on
tests/test-c32srtombs-4.sh.
* modules/c32stombs-tests: New file, based on modules/c32srtombs-tests.