jack_oscrolloscope: fix build

commit 7aeac03 (PR #386495) dropped libX11 and libGLU from propagatedBuildInputs in SDL_compat, and #389106 pointed SDL to SDL_compat, which broke this build

Hydra fail: https://hydra.nixos.org/build/292734958

Grimmauld 04df50e8 2341cd6a

+2
+2
pkgs/by-name/ja/jack_oscrolloscope/package.nix
··· 6 libjack2, 7 libGLU, 8 libGL, 9 pkg-config, 10 }: 11 ··· 24 libjack2 25 libGLU 26 libGL 27 ]; 28 29 installPhase = ''
··· 6 libjack2, 7 libGLU, 8 libGL, 9 + libX11, 10 pkg-config, 11 }: 12 ··· 25 libjack2 26 libGLU 27 libGL 28 + libX11 29 ]; 30 31 installPhase = ''