i.e. 4E00-9FAF -> 4E00-9FFF.

According to <https://www.unicode.org/mail-arch/unicode-ml/y2003-m02/0351.html>,
the confusion was partly due to older Unicode specification.
As of Unicode 4.1 the trailing end (9FB0-9FFF) is in fact in use
by "CJK Additions": <https://www.unicode.org/versions/Unicode4.1.0/>

Change-Id: Ibd3704a81341743b3fa80686d3fcfc0bd11104ef
Reviewed-on: https://gerrit.libreoffice.org/67087
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>