audio/fasttracker2: Update to v1.10

Changes since v1.09:

v1.10 - 03.03.2020
- Bugfix: Channels were internally muted when the tracker was first started.
  You'd get no sound when trying to load samples and entering them in the
  pattern data. You had to load a song for them to properly unmute...
  This has been a bug since v1.04, yikes!
- The audio mixer's resampling interpolation was upgraded from 3-tap cubic to
  4-tap cubic, without affecting the performance of the mixer.
- Fixed some bugs in the .PAT (Gravis Utrasound patch) instrument loader
- Fixed several bugs with the "Echo" toolbox (Sampler screen)
- Bugfix: The "relative tone" section of the Instr. Ed. screen would get messed
  up if loading a WAV/AIFF sample whose playback frequency is immensely large.
- Code cleanup

(fox)