sysutils/wmmemload: revive port and update to 0.1.8 [1]

Other changes include:

• Drop gmake dependency [1]
• Drop DOCS consisting only of ChangeLog [1]
• Define LICENSE as GPLv2+ like in debian/copyright
• Reword COMMENT and pkg-descr to drop indefinite article and author line

Changes: http://repo.or.cz/w/dockapps.git/blob_plain/refs/tags/wmmemload-0.1.8:/wmmemload/ChangeLog
PR: 202745 [1]
Submitted by: Marco Beishuizen <mbeis@xs4all.nl> [1]