bs1770gain-0.8.4.1-bp156.2.8

- Update to version 0.8.4:
  * No changelog provided from upstream.
  * Package now builds against ffmpeg-5.
- Rebase patch.

- Update to version 0.7.0
  * Improved configuration w.r.t. pthreads.
  * Fixed some synchronization issues.
  * Support multiple threads from within bs1770gain
    option --threads=<number of threads>
    Currently option --threads=<number of threads> just makes
    sense when used in conjunction with options -o/--output or
  - -overwrite and may result in a significant performance gain
    (it's meant for mass replay-gain tagging):
  * Fixed a flaw with option -x rename.

- Initial package, version 0.6.9