Update Chinese Pinyin related ports:
chinese/ibus-libpinyin: 1.10.0 -> 1.11.1, enable OpenCC
chinese/libpinyin: 2.2.0 -> 2.3.0
textproc/ibus: 1.5.18 -> 1.5.20, while there also fix pkg-message for Qt
Reviewed: Zhihao Yuan <lichray gmail com>, Henry Hu <henry.hu.sh gmail com>
Differential Revision: https://reviews.freebsd.org/D21177