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/shared-memory-ring/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildDunePackage
+, fetchurl
+, ppx_cstruct
+, mirage-profile
+, cstruct
+, ounit
+, stdlib-shims
+}:
+
+buildDunePackage rec {
+  pname = "shared-memory-ring";
+  version = "3.1.0";
+
+  useDune2 = true;
+
+  src = fetchurl {
+    url = "https://github.com/mirage/shared-memory-ring/releases/download/v${version}/shared-memory-ring-v${version}.tbz";
+    sha256 = "06350ph3rdfvybi0cgs3h3rdkmjspk3c4375rxvbdg0kza1w22x1";
+  };
+
+  nativeBuildInputs = [
+    ppx_cstruct
+  ];
+
+  propagatedBuildInputs = [
+    mirage-profile
+    cstruct
+    stdlib-shims
+  ];
+
+  doCheck = true;
+  checkInputs = [
+    ounit
+  ];
+
+  meta = with lib; {
+    description = "Shared memory rings for RPC and bytestream communications";
+    license = licenses.isc;
+    homepage = "https://github.com/mirage/shared-memory-ring";
+    maintainers = [ maintainers.sternenseemann ];
+  };
+}