audio/lv2: add new port
PR: 197126, 213285 (based on)
Submitted by: Radim Kolar <firstname.lastname@example.org>, Michael Beer
LV2 is an open standard for audio plugins, used by hundreds of plugins
and other projects. At its core, LV2 is a simple stable interface,
accompanied by extensions which add functionality to support the needs
of increasingly powerful audio software.