Upgrade editors/openoffice-4 to version 4.1.6:

• Fixed bugs which caused improper handling (crashes) when using Microsoft Drawing Binary File format
• Fix a loop that visits all objects on a page so that all objects get visited
• Updated logos

Release notes: https://s.apache.org/AOO-416releasenotes

Pet portlint (add missing USES= entries).

MFH: 2018Q4