* Makefile (do-tst-ctype): Add do-tst-mbswcs to list of dependencies.
(TEST_MBWC_ENV): Remove unnecessary slash.
* tst-ctype.sh: Add de_DE.UTF-8 to list of tested locales.
* tests-mbwc/dat_iswalnum.c (TST_ISW_LOC): Correct UTF-8 input data.
* Makefile: Add do-tst-mbswcs to dependencies of locale test suite
tests.