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/python-modules/xxhash/default.nix

@@ -0,0 +1,26 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, setuptools-scm
+}:
+
+buildPythonPackage rec {
+  version = "3.0.0";
+  pname = "xxhash";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-MLLZeq8R+xIgI/a0TruXxpVengDXRhqWQVygMLXOucc=";
+  };
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/ifduyue/python-xxhash";
+    description = "Python Binding for xxHash https://pypi.org/project/xxhash/";
+    license = licenses.bsd2;
+    maintainers = [ maintainers.teh ];
+  };
+}