Bug 16952: Czech language definitions for sorting in Zebra

Bug 16952: Czech language definitions for sorting in Zebra

Test plan:
1) Apply patch
2) Create new instance with parameter --zebralang cs
3) Insert some record with basic latin characters and some with "czech" characters (for example: "č" - should be sorted after "c", "š" - should be sorted after "s")
4) Try to search in katalog (staff and opac) and sort by other field then relevance - title or author for instance
5) Records should be sorted correctly by Czech rules
6) Look at code and confirm it is ok

Signed-off-by: radiuscz <radek.siman@centrum.cz>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
I did not test this patch, but trust in the author and signoffer

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit bd13efd8ac1121286dd565c40111b491b61d54cf)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>