wavpack: update to version 5.8.1

wavpack: update to version 5.8.1

"This dot release replaces 5.8.0 that was missing a couple CMake files
 in the tarball and the multicore detection did not compile on MacOS
 and other BSDs. Because the Windows executables were not affected I
 will not be updating them."

 --------------------------------
 Release 5.8.0 - January 27, 2025
 --------------------------------

  added: if present, use multiple cores by default (cli programs only)
  added: option --no-threads to force single-threading (cli programs)
  fixed: noise issue in hybrid mode (low bitrate / high sample rate)
  improved: all new DNS algorithm for better hybrid mode quality
  improved: "extra" option with multithreading and hybrid modes
  added: TSOC (Composer Sort) added to handled ID3v2 tags
  added: --no-overwrite command-line option to wvunpack
  fixed: handling of 24+ channels (CoolEdit / Audition)
  fixed: encoding raw audio from pipes (Windows only)
  fixed: handling of unpacked samples in WAV files
  fixed: rare command-line option parsing issue

Signed-off-by: Daniel Golle <[email protected]>