Korean words are composed of Hangul and are separated
by space or newline. This patch improves line breaking
function in CJK break iterator so that it does not
break Korean words in the middle. It now breaks at the
first character of the last Korean word.

Change-Id: I91b20733c0c5ec4755bf68eb0d7c14c42c1f3556
Reviewed-on: https://gerrit.libreoffice.org/42987Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>