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/tls/async.nix

@@ -0,0 +1,21 @@
+{ lib, buildDunePackage, tls, async, cstruct-async, core, cstruct, mirage-crypto-rng-async }:
+
+buildDunePackage rec {
+  pname = "tls-async";
+
+  inherit (tls) src meta version;
+
+  minimumOCamlVersion = "4.08";
+  useDune2 = true;
+
+  doCheck = true;
+
+  propagatedBuildInputs = [
+    async
+    core
+    cstruct
+    cstruct-async
+    mirage-crypto-rng-async
+    tls
+  ];
+}