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/mirage-crypto/ec.nix

@@ -0,0 +1,58 @@
+{ lib
+, ocaml
+, buildDunePackage
+, mirage-crypto
+, dune-configurator
+, pkg-config
+, cstruct
+, mirage-crypto-rng
+, mirage-crypto-pk
+, hex
+, alcotest
+, asn1-combinators
+, ppx_deriving_yojson
+, ppx_deriving
+, yojson
+, withFreestanding ? false
+, ocaml-freestanding
+}:
+
+buildDunePackage rec {
+  pname = "mirage-crypto-ec";
+
+  inherit (mirage-crypto)
+    minimumOCamlVersion
+    src
+    version
+    useDune2;
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [
+    ocaml
+    dune-configurator
+  ];
+  propagatedBuildInputs = [
+    cstruct
+    mirage-crypto
+    mirage-crypto-rng
+  ] ++ lib.optionals withFreestanding [
+    ocaml-freestanding
+  ];
+
+  strictDeps = !doCheck;
+
+  doCheck = true;
+  checkInputs = [
+    hex
+    alcotest
+    asn1-combinators
+    ppx_deriving_yojson
+    ppx_deriving
+    yojson
+    mirage-crypto-pk
+  ];
+
+  meta = mirage-crypto.meta // {
+    description = "Elliptic Curve Cryptography with primitives taken from Fiat";
+  };
+}