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/os-specific/linux/uhk-agent/default.nix

@@ -0,0 +1,39 @@
+{ appimageTools, lib, fetchurl, polkit, udev }:
+let
+  pname = "uhk-agent";
+  version = "1.5.17";
+  src = fetchurl {
+    url = "https://github.com/UltimateHackingKeyboard/agent/releases/download/v${version}/UHK.Agent-${version}-linux-x86_64.AppImage";
+    name = "${pname}-${version}.AppImage";
+    sha256 = "sha256-auOoTTRmkXVDDvcmRFzQIStNlbai8bTBLb/KUjk6EAc=";
+  };
+
+  appimageContents = appimageTools.extract {
+    name = "${pname}-${version}";
+    inherit src;
+  };
+in appimageTools.wrapType2 {
+  inherit pname version src;
+
+  extraPkgs = pkgs: with pkgs; [ polkit udev ];
+
+  extraInstallCommands = ''
+    mv $out/bin/${pname}-${version} $out/bin/${pname}
+
+    install -m 444 -D ${appimageContents}/${pname}.desktop -t $out/share/applications
+    install -m 644 -D ${appimageContents}/resources/rules/50-uhk60.rules $out/rules/50-uhk60.rules
+    substituteInPlace $out/share/applications/${pname}.desktop \
+      --replace 'Exec=AppRun' 'Exec=${pname}'
+    cp -r ${appimageContents}/usr/share/icons $out/share
+  '';
+  # wrapType2 does not passthru pname+version
+  passthru.version = version;
+
+  meta = with lib; {
+    description = "Agent is the configuration application of the Ultimate Hacking Keyboard";
+    homepage = "https://github.com/UltimateHackingKeyboard/agent";
+    license = licenses.unfreeRedistributable;
+    maintainers = with maintainers; [ ngiger ];
+    platforms = [ "x86_64-linux" ];
+  };
+}