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/importlib-metadata/default.nix

@@ -0,0 +1,50 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, setuptools
+, setuptools-scm
+, typing-extensions
+, toml
+, zipp
+}:
+
+buildPythonPackage rec {
+  pname = "importlib-metadata";
+  version = "4.11.3";
+  format = "pyproject";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    pname = "importlib_metadata";
+    inherit version;
+    hash = "sha256-6kxZfr83FC+Ce485KZV54xaFwx06Q4tZ9GlAav0PJTk=";
+  };
+
+  nativeBuildInputs = [
+    setuptools # otherwise cross build fails
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    toml
+    zipp
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    typing-extensions
+  ];
+
+  # Cyclic dependencies due to pyflakefs
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "importlib_metadata"
+  ];
+
+  meta = with lib; {
+    description = "Read metadata from Python packages";
+    homepage = "https://importlib-metadata.readthedocs.io/";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ fab ];
+  };
+}