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/build-support/templaterpm/default.nix

@@ -0,0 +1,25 @@
+{lib, stdenv, makeWrapper, python, toposort, rpm}:
+
+stdenv.mkDerivation {
+  pname = "nix-template-rpm";
+  version = "0.1";
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ python toposort rpm ];
+
+  dontUnpack = true;
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp ${./nix-template-rpm.py} $out/bin/nix-template-rpm
+    wrapProgram $out/bin/nix-template-rpm \
+      --set PYTHONPATH "${rpm}/lib/${python.libPrefix}/site-packages":"${toposort}/lib/${python.libPrefix}/site-packages"
+    '';
+
+  meta = with lib; {
+    description = "Create templates of nix expressions from RPM .spec files";
+    maintainers = with maintainers; [ tstrobel ];
+    platforms = platforms.unix;
+    hydraPlatforms = [];
+  };
+}