german/wordpress: Update from 4.8 to 4.8.1 and Unbreak

[joneum]

Summary

• german/wordpress: Update from 4.8 to 4.8.1
• Changelog: https://codex.wordpress.org/Version_4.8.1#List_of_Files_Revised
• Unbreak: fetch fine with this Update

Approved by: xxx (mentor)
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

Test Plan

:~/dev/ports/german/wordpress % 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:

10.3-amd64
10.3-i386
11.1-amd64
11.1-i386
12.0-CURRENT r321899 amd64
12.0-CURRENT r321913 i386