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/angstrom-lwt-unix/default.nix

@@ -0,0 +1,19 @@
+{ lib, fetchFromGitHub, buildDunePackage, angstrom, ocaml_lwt }:
+
+buildDunePackage rec {
+  pname = "angstrom-lwt-unix";
+
+  inherit (angstrom) version useDune2 src;
+
+  minimumOCamlVersion = "4.03";
+
+  propagatedBuildInputs = [ angstrom ocaml_lwt ];
+
+  doCheck = true;
+
+  meta = {
+    inherit (angstrom.meta) homepage license;
+    description = "Lwt_unix support for Angstrom";
+    maintainers = with lib.maintainers; [ romildo ];
+  };
+}