uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/applications/audio/munt/libmt32emu.nix

@@ -0,0 +1,38 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+}:
+
+stdenv.mkDerivation rec {
+  pname = "libmt32emu";
+  version = "2.6.3";
+
+  src = fetchFromGitHub {
+    owner = "munt";
+    repo = "munt";
+    rev = "${pname}_${lib.replaceChars [ "." ] [ "_" ] version}";
+    sha256 = "0ncy55fj9l2s750clxjpv102hrgcndz4qba9w2sf8lwzgy6d1xmp";
+  };
+
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  dontFixCmake = true;
+
+  cmakeFlags = [
+    "-Dmunt_WITH_MT32EMU_SMF2WAV=OFF"
+    "-Dmunt_WITH_MT32EMU_QT=OFF"
+  ];
+
+  meta = with lib; {
+    homepage = "http://munt.sourceforge.net/";
+    description = "A library to emulate Roland MT-32, CM-32L, CM-64 and LAPC-I devices";
+    license = with licenses; [ lgpl21Plus ];
+    maintainers = with maintainers; [ OPNA2608 ];
+    platforms = platforms.unix; # Not tested on ReactOS yet :)
+  };
+}