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/opam-format/default.nix

@@ -0,0 +1,23 @@
+{ lib, buildDunePackage, unzip, opam-core, opam-file-format }:
+
+buildDunePackage rec {
+  pname = "opam-format";
+
+  useDune2 = true;
+
+  inherit (opam-core) src version;
+
+  minimumOCamlVersion = "4.02.3";
+
+  # get rid of check for curl at configure time
+  # opam-format does not call curl at run time
+  configureFlags = [ "--disable-checks" ];
+
+  nativeBuildInputs = [ unzip ];
+  propagatedBuildInputs = [ opam-core opam-file-format ];
+
+  meta = opam-core.meta // {
+    description = "Definition of opam datastructures and its file interface";
+    maintainers = with lib.maintainers; [ sternenseemann ];
+  };
+}