[Ohrrpgce] SVN: teeemcee/13052 Update SDL2_mixer.dll to 2.6.1 and change all its playback libraries

[subversion at HamsterRepublic.com]

teeemcee
2022-08-15 01:18:52 -0700 (Mon, 15 Aug 2022)
538
Update SDL2_mixer.dll to 2.6.1 and change all its playback libraries

A lot of new features and much smaller.

Built with my mxe branch (https://github.com/rversteegen/mxe commit
be89c2e1).
Previous patches for loop points, etc, no longer needed.
Still built to expose all symbols, so can access stb_vorbis and drmp3.

    Library versions used:
     SDL2_mixer 2.6.1
     SDL 2.0.22
     libxmp-lite 4.5.1 (replaces libmodplug)
     drmp3 (builtin version) (replaces libogg, libvorbis)
     stb_vorbis (builtin version) (replaces libmad)
---
UU  wip/SDL2_mixer.dll
U   wip/win32/SDL2_mixer.pdb
U   wip/win32/build_sdl_mixer.sh
U   wip/win32/debug/SDL2_mixer.dll
U   wip/win32/libSDL2_mixer.dll.a