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/tools/misc/betterdiscord-installer/default.nix

@@ -0,0 +1,32 @@
+{ appimageTools, lib, fetchurl }:
+let
+  pname = "betterdiscord-installer";
+  version = "1.0.0-beta";
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = "https://github.com/BetterDiscord/Installer/releases/download/v${version}/Betterdiscord-Linux.AppImage";
+    sha256 = "103acb11qmvjmf6g9lgsfm5jyahfwfdqw0x9w6lmv1hzwbs26dsr";
+  };
+
+  appimageContents = appimageTools.extract { inherit name src; };
+in appimageTools.wrapType2 {
+  inherit name src;
+
+  extraInstallCommands = ''
+    mv $out/bin/${name} $out/bin/${pname}
+
+    install -m 444 -D ${appimageContents}/betterdiscord.desktop -t $out/share/applications
+    substituteInPlace $out/share/applications/betterdiscord.desktop \
+      --replace 'Exec=AppRun' 'Exec=${pname}'
+    cp -r ${appimageContents}/usr/share/icons $out/share
+  '';
+
+  meta = with lib; {
+    description = "Installer for BetterDiscord";
+    homepage = "https://betterdiscord.app";
+    license = licenses.mit;
+    maintainers = [ maintainers.ivar ];
+    platforms = [ "x86_64-linux" ];
+  };
+}