wcrtomb tests: Renumber tests. * tests/test-wcrtomb.sh: Renamed 1 -> 2 -> 3 -> 4 -> 5 -> 1. * tests/test-wcrtomb.c: Update. * tests/test-wcrtomb-w32-*.sh: Renamed 1 -> 2 -> 3 -> 5 -> 7 -> 4 -> 6 -> 8. * tests/test-wcrtomb-w32.c: Update. * modules/wcrtomb-tests: Update.