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/extractcode/7z.nix

@@ -0,0 +1,49 @@
+{ lib
+, fetchFromGitHub
+, buildPythonPackage
+, plugincode
+, p7zip
+}:
+
+buildPythonPackage rec {
+  pname = "extractcode-7z";
+  version = "21.5.31";
+
+  src = fetchFromGitHub {
+    owner = "nexB";
+    repo = "scancode-plugins";
+    rev = "v${version}";
+    sha256 = "02qinla281fc6pmg5xzsrmqnf9js76f2qcbf98zq7m2dkn70as4w";
+  };
+
+  sourceRoot = "source/builtins/extractcode_7z-linux";
+
+  propagatedBuildInputs = [
+    plugincode
+  ];
+
+  preBuild = ''
+    pushd src/extractcode_7z/bin
+
+    rm 7z 7z.so
+    ln -s ${p7zip}/bin/7z 7z
+    ln -s ${p7zip}/lib/p7zip/7z.so 7z.so
+
+    popd
+  '';
+
+  # no tests
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "extractcode_7z"
+  ];
+
+  meta = with lib; {
+    description = "A ScanCode Toolkit plugin to provide pre-built binary libraries and utilities and their locations";
+    homepage = "https://github.com/nexB/scancode-plugins/tree/main/builtins/extractcode_7z-linux";
+    license = with licenses; [ asl20 lgpl21 ];
+    maintainers = teams.determinatesystems.members;
+    platforms = platforms.linux;
+  };
+}