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/hxd/default.nix

@@ -0,0 +1,40 @@
+{ lib, buildDunePackage, fetchurl
+, ocaml, dune-configurator, cmdliner
+, lwt, withLwt ? lib.versionAtLeast ocaml.version "4.07"
+}:
+
+buildDunePackage rec {
+  pname = "hxd";
+  version = "0.3.1";
+
+  useDune2 = true;
+
+  minimumOCamlVersion = "4.06";
+
+  src = fetchurl {
+    url = "https://github.com/dinosaure/hxd/releases/download/v${version}/hxd-v${version}.tbz";
+    sha256 = "1c226c91e17cd329dec0c287bfd20f36302aa533069ff9c6ced32721f96b29bc";
+  };
+
+  # ignore yes stderr output due to trapped SIGPIPE
+  postPatch = ''
+    sed -i 's|yes ".\+"|& 2> /dev/null|' test/*.t
+  '';
+
+  propagatedBuildInputs = lib.optional withLwt lwt;
+
+  buildInputs = [
+    cmdliner
+    dune-configurator
+  ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Hexdump in OCaml";
+    homepage = "https://github.com/dinosaure/hxd";
+    license = licenses.mit;
+    maintainers = [ maintainers.sternenseemann ];
+    mainProgram = "hxd.xxd";
+  };
+}