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/cohttp/async.nix

@@ -0,0 +1,60 @@
+{ lib
+, buildDunePackage
+, ppx_sexp_conv
+, base
+, async
+, async_kernel
+, async_unix
+, cohttp
+, conduit-async
+, uri
+, uri-sexp
+, logs
+, fmt
+, sexplib0
+, ipaddr
+, magic-mime
+, ounit
+, mirage-crypto
+, core
+}:
+
+buildDunePackage {
+  pname = "cohttp-async";
+
+  inherit (cohttp)
+    version
+    src
+    minimumOCamlVersion
+    useDune2
+    ;
+
+  buildInputs = [ ppx_sexp_conv ];
+
+  propagatedBuildInputs = [
+    cohttp
+    conduit-async
+    async_kernel
+    async_unix
+    async
+    base
+    magic-mime
+    logs
+    fmt
+    sexplib0
+    uri
+    uri-sexp
+    ipaddr
+  ];
+
+  doCheck = true;
+  checkInputs = [
+    ounit
+    mirage-crypto
+    core
+  ];
+
+  meta = cohttp.meta // {
+    description = "CoHTTP implementation for the Async concurrency library";
+  };
+}