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/pipebang/default.nix

@@ -0,0 +1,26 @@
+{ lib, buildOcaml, fetchFromGitHub, camlp4 }:
+
+buildOcaml rec {
+  pname = "pipebang";
+  version = "113.00.00";
+
+  minimumSupportedOcamlVersion = "4.00";
+
+  src = fetchFromGitHub {
+    owner = "janestreet";
+    repo = "pipebang";
+    rev = version;
+    sha256 = "sha256-9A3X/ciL5HtuKQ5awS+hDDBLL5ytOr12wHsmJLNRn+Q=";
+  };
+
+  strictDeps = true;
+
+  propagatedBuildInputs = [ camlp4 ];
+
+  meta = with lib; {
+    homepage = "https://github.com/janestreet/pipebang";
+    description = "Syntax extension to transform x |! f into f x";
+    license = licenses.asl20;
+    maintainers = [ maintainers.ericbmerritt ];
+  };
+}