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/X11/xwallpaper/default.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv
+, fetchFromGitHub
+, pkg-config
+, autoreconfHook
+, installShellFiles
+, pixman
+, xcbutil
+, xcbutilimage
+, libseccomp
+, libjpeg
+, libpng
+, libXpm
+}:
+
+stdenv.mkDerivation rec {
+  pname = "xwallpaper";
+  version = "0.7.3";
+
+  src = fetchFromGitHub {
+    owner = "stoeckmann";
+    repo = "xwallpaper";
+    rev = "v${version}";
+    sha256 = "sha256-O4VynpP3VJY/p6+NLUuKetwoMfbp93aXTiRoQJkgW+c=";
+  };
+
+  nativeBuildInputs = [ pkg-config autoreconfHook installShellFiles ];
+  buildInputs = [ pixman xcbutilimage xcbutil libseccomp libjpeg libpng libXpm ];
+
+  postInstall = ''
+    installShellCompletion --zsh _xwallpaper
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/stoeckmann/xwallpaper";
+    description = "Utility for setting wallpapers in X";
+    license = licenses.isc;
+    maintainers = with maintainers; [ ivar ];
+    platforms = platforms.linux;
+  };
+}