multimedia/libxine: update to 1.2.12

From ChangeLog: https://sourceforge.net/projects/xine/files/xine-lib/1.2.12/README.txt/download

• Add string tree library (generic info parser).
• Add OpenSL ES audio output plugin.
• Add mpeg-dash input plugin.
• Add crypto input plugin.
• Add VAAPI support to opengl2 video output (requires using EGL).
• Better hls support.
• Improved DVB/live stream timing.
• Improved BT.2020 support.
• Fix compatibility with ffmpeg 5.0.
• Fix RSS parser.
• Fix output parameter setting (audio amplification, video hue etc.).
• Fix AC3 demuxer.
• Diverse small fixes and optimizations.
• Update german translation.
• Code cleanup.
• Build fixes.

Update plugins directory references in dependent ports
Bump PORTREVISION

Reported by: portscout