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/paf/le.nix

@@ -0,0 +1,41 @@
+{ lib
+, buildDunePackage
+, paf
+, duration
+, emile
+, httpaf
+, letsencrypt
+, mirage-stack
+, mirage-time
+, tls-mirage
+, x509
+}:
+
+buildDunePackage {
+  pname = "paf-le";
+
+  inherit (paf)
+    version
+    src
+    useDune2
+    minimumOCamlVersion
+  ;
+
+  propagatedBuildInputs = [
+    paf
+    duration
+    emile
+    httpaf
+    letsencrypt
+    mirage-stack
+    mirage-time
+    tls-mirage
+    x509
+  ];
+
+  doCheck = true;
+
+  meta = paf.meta // {
+    description = "A CoHTTP client with its HTTP/AF implementation";
+  };
+}