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/development/tools/ocaml/js_of_ocaml/ppx.nix

@@ -0,0 +1,15 @@
+{ buildDunePackage, js_of_ocaml-compiler
+, ppxlib
+, js_of_ocaml
+}:
+
+buildDunePackage {
+  pname = "js_of_ocaml-ppx";
+
+  inherit (js_of_ocaml-compiler) version src useDune2;
+
+  buildInputs = [ js_of_ocaml ];
+  propagatedBuildInputs = [ ppxlib ];
+
+  meta = builtins.removeAttrs js_of_ocaml-compiler.meta [ "mainProgram" ];
+}