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/carton/git.nix

@@ -0,0 +1,28 @@
+{ buildDunePackage, carton, carton-lwt
+, bigarray-compat, bigstringaf, lwt, fpath, result
+, mmap, fmt, decompress, astring
+, alcotest, alcotest-lwt, cstruct, logs
+, mirage-flow, rresult, ke
+}:
+
+buildDunePackage {
+  pname = "carton-git";
+
+  inherit (carton) version src useDune2 postPatch;
+
+  propagatedBuildInputs = [
+    carton
+    carton-lwt
+    bigarray-compat
+    bigstringaf
+    lwt
+    fpath
+    result
+    mmap
+    fmt
+    decompress
+    astring
+  ];
+
+  inherit (carton) meta;
+}