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/ocaml-modules/rpclib/lwt.nix

@@ -0,0 +1,18 @@
+{ lib, buildDunePackage, rpclib
+, lwt
+, alcotest-lwt, ppx_deriving_rpc, yojson
+}:
+
+buildDunePackage {
+  pname = "rpclib-lwt";
+  inherit (rpclib) version useDune2 src;
+
+  propagatedBuildInputs = [ lwt rpclib ];
+
+  checkInputs = [ alcotest-lwt ppx_deriving_rpc yojson ];
+  doCheck = true;
+
+  meta = rpclib.meta // {
+    description = "A library to deal with RPCs in OCaml - Lwt interface";
+  };
+}