[BZ #22336]
* localedata/locales/cs_CZ (LC_COLLATE): Use “copy "iso14651_t1"”
and implement the collation rules for cs from CLDR on top of that.
* Makefile: Add cs_CZ.UTF-8 to test-input and to the list
of locales to be built for testing.
* cs_CZ.UTF-8.in: New file with test data to test the Czech sorting.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
