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/cohttp.nix

@@ -0,0 +1,53 @@
+{ lib
+, buildDunePackage
+, paf
+, cohttp-lwt
+, domain-name
+, httpaf
+, ipaddr
+, alcotest-lwt
+, fmt
+, logs
+, mirage-crypto-rng
+, mirage-time-unix
+, tcpip
+, uri
+, lwt
+, astring
+}:
+
+buildDunePackage {
+  pname = "paf-cohttp";
+
+  inherit (paf)
+    version
+    src
+    useDune2
+    minimumOCamlVersion
+  ;
+
+  propagatedBuildInputs = [
+    paf
+    cohttp-lwt
+    domain-name
+    httpaf
+    ipaddr
+  ];
+
+  doCheck = false;  # tests fail
+  checkInputs = [
+    alcotest-lwt
+    fmt
+    logs
+    mirage-crypto-rng
+    mirage-time-unix
+    tcpip
+    uri
+    lwt
+    astring
+  ];
+
+  meta = paf.meta // {
+    description = "A CoHTTP client with its HTTP/AF implementation";
+  };
+}