NEW: audio/vgmplay

Hi ports --

Attached is a new port, audio/vgmplay. vgmplay is a command line audio
player for VGM files.

---
pkg/DESCR:
VGMPlay is a command line audio player for all VGM files.

Supported files types are:
* Video Game Music Files (*.vgm, *.vgz)
* Creative Music Files (*.cmf)
* DosBox RAW OPL Log Files (*.dro)
* Playlist files (*.m3u)
---

Plays perfectly well on my laptop. Built fine on armv7 and arm64, but no
audio hardware to test on those machines.

OK?

~Brian