chinese/wordpress-zh_TW: Update to 4.7.5

[joneum]

Summary

• chinese/wordpress-zh_TW: Update to 4.7.5
• Changelog: https://wordpress.org/news/2017/05/wordpress-4-7-5/

Approved by: xxx (mentor)
Security: a5bb7ea0-3e58-11e7-94a2-00e04c1ea73d
MFH: 2017Q2
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

Test Plan

~/dev/ports/chinese/wordpress-zh_TW % portlint -AC
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
0 fatal errors and 1 warning found.

poudriere testport:

10amd64
10i386
11amd64
11i386
12.0-CURRENT r318899 amd64
12.0-CURRENT r318400 i386