multimedia/mpc-qt:

• Add patch to fix mpcwidget crash on mpv 0.26.0

multimedia/mpv:

• Update mpv to 0.26.0
• Update waf to 1.9.8 using the same waf version as bootstrap.py
• Update ffmpeg version required to 3.3
• Drop unnecessary CONFIGURE_ARGS options
• Fix option helpers
• Update WWW in pkg-descr

Changelog: https://github.com/mpv-player/mpv/releases/tag/v0.26.0

Reviewed by: jbeich
Approved by: jbeich (mpc-qt, maintainer)
Differential Revision: https://reviews.freebsd.org/D11655