multimedia/Bento4: update to 1.6.0-641

Changelog: https://github.com/axiomatic-systems/Bento4/compare/v1.6.0-640...v1.6.0-641

Major changes:

• Added CBCS encryption for DVHE and DVH1
• Add AC4 signaling for IMS stereo and CBI(channel based immersive) in HLS
• Added dvhe and dvh1 support to cbcs
• Add support characteristic for HLS
• Update doc
• Multiple bugfixes
  • #772 mp4xx vulnerabilities can cause serious errors
  • #750 Memory leaks with ASAN in mp42ts
  • #856 mp4dash not working with encrypted input and --clearkey
  • #859 HLS AUDIO AAC 7.1 CHANNELS 7 mistake

PR: 279611
Reported by: Älven <alster@vinterdalen.se>