Add the following people for their contribution to ports:

• KIMURA Shigekazu <zau50357@lion.zero.ad.jp>

for japanese/xvi-{euc,sjjs}

• Takayuki Nakao <t@nakao.org>

for apanese/yc.el

• Tetsuro Yabu <yabu@uopmu.ees.osakafu-u.ac.jp>

for japanese/t2ps