Merge pull request #745 from lovek323/fluidsynth

fluidsynth: fix build on darwin

pkgs/applications/audio/fluidsynth/default.nix

···
   preBuild = stdenv.lib.optionalString stdenv.isDarwin ''
     sed -i '40 i\
     #include <CoreAudio/AudioHardware.h>\
-    #include <CoreAudio/AudioHardwareBase.h>\
     #include <CoreAudio/AudioHardwareDeprecated.h>' \
     src/drivers/fluid_coreaudio.c
   '';