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/checkseum/default.nix

@@ -0,0 +1,48 @@
+{ lib, fetchurl, buildDunePackage, dune-configurator, pkg-config
+, bigarray-compat, optint
+, fmt, rresult, bos, fpath, astring, alcotest
+, withFreestanding ? false
+, ocaml-freestanding
+}:
+
+buildDunePackage rec {
+  version = "0.3.2";
+  pname = "checkseum";
+
+  useDune2 = true;
+
+  minimumOCamlVersion = "4.07";
+
+  src = fetchurl {
+    url = "https://github.com/mirage/checkseum/releases/download/v${version}/checkseum-v${version}.tbz";
+    sha256 = "9cdd282ea1cfc424095d7284e39e4d0ad091de3c3f2580539d03f6966d45ccd5";
+  };
+
+  buildInputs = [ dune-configurator ];
+  nativeBuildInputs = [ pkg-config ];
+  propagatedBuildInputs = [
+    bigarray-compat
+    optint
+  ] ++ lib.optionals withFreestanding [
+    ocaml-freestanding
+  ];
+
+  checkInputs = [
+    alcotest
+    bos
+    astring
+    fmt
+    fpath
+    rresult
+  ];
+
+  doCheck = true;
+
+  meta = {
+    description = "ADLER-32 and CRC32C Cyclic Redundancy Check";
+    homepage = "https://github.com/mirage/checkseum";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.vbgl ];
+    mainProgram = "checkseum.checkseum";
+  };
+}