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/xdg-user-dirs/default.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchurl, libxslt, docbook_xsl, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  pname = "xdg-user-dirs";
+  version = "0.17";
+
+  src = fetchurl {
+    url = "https://user-dirs.freedesktop.org/releases/xdg-user-dirs-${version}.tar.gz";
+    sha256 = "13216b8rfkzak5k6bvpx6jvqv3cnbgpijnjwj8a8d3kq4cl0a1ra";
+  };
+
+  nativeBuildInputs = [ makeWrapper libxslt docbook_xsl ];
+
+  preFixup = ''
+    # fallback values need to be last
+    wrapProgram "$out/bin/xdg-user-dirs-update" \
+      --suffix XDG_CONFIG_DIRS : "$out/etc/xdg"
+  '';
+
+  meta = with lib; {
+    homepage = "http://freedesktop.org/wiki/Software/xdg-user-dirs";
+    description = "A tool to help manage well known user directories like the desktop folder and the music folder";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ ];
+    platforms = platforms.linux;
+  };
+}