Bug 22787: Add mapping of letters "ů" and "Ů" to zebra definitions

Bug 22787: Add mapping of letters "ů" and "Ů" to zebra definitions

Test plan:
0) Do not apply the patch
1) Add some word with character "ů" into metadata, for example author "Martinů, Bohuslav"
2) Try to search it with "Martinu" and you'll see you can't find it
3) Apply the patch
4) Copy file etc/zebradb/etc/word-phrase-utf.chr to your /etc/koha directory
    sudo cp etc/zebradb/etc/word-phrase-utf.chr /etc/koha/zebradb/etc/
5) koha-zebra --restart kohadev
6) koha-rebuild-zebra -f kohadev
6) try to search "Martinu" again - you should be able to find your record

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Michal Denar <black23@gmail.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>