* tests/test-c32srtombs.c: New file, based on tests/test-wcsrtombs.c.
* tests/test-c32srtombs-1.sh: New file, based on
tests/test-wcsrtombs1.sh.
* tests/test-c32srtombs-2.sh: New file, based on
tests/test-wcsrtombs2.sh.
* tests/test-c32srtombs-3.sh: New file, based on
tests/test-wcsrtombs3.sh.
* tests/test-c32srtombs-4.sh: New file, based on
tests/test-wcsrtombs4.sh.
* modules/c32srtombs-tests: New file, based on modules/wcsrtombs-tests.