fluidsynth: 1.1.8 -> 1.1.9

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9/bin/fluidsynth -h` got 0 exit code
- ran `/nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9/bin/fluidsynth --help` got 0 exit code
- ran `/nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9/bin/fluidsynth -V` and found version 1.1.9
- ran `/nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9/bin/fluidsynth --version` and found version 1.1.9
- ran `/nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9/bin/fluidsynth -h` and found version 1.1.9
- ran `/nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9/bin/fluidsynth --help` and found version 1.1.9
- found 1.1.9 with grep in /nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9
- found 1.1.9 in filename of file in /nix/store/lahkxc281j7vxzivbp68c71k6jgjzmcj-fluidsynth-1.1.9