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>

nixos/lib/test-driver/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, python3Packages
+, enableOCR ? false
+, qemu_pkg ? qemu_test
+, coreutils
+, imagemagick_light
+, libtiff
+, netpbm
+, qemu_test
+, socat
+, tesseract4
+, vde2
+, extraPythonPackages ? (_ : [])
+}:
+
+python3Packages.buildPythonApplication rec {
+  pname = "nixos-test-driver";
+  version = "1.1";
+  src = ./.;
+
+  propagatedBuildInputs = [
+    coreutils
+    netpbm
+    python3Packages.colorama
+    python3Packages.ptpython
+    qemu_pkg
+    socat
+    vde2
+  ]
+    ++ (lib.optionals enableOCR [ imagemagick_light tesseract4 ])
+    ++ extraPythonPackages python3Packages;
+
+  doCheck = true;
+  checkInputs = with python3Packages; [ mypy pylint black ];
+  checkPhase = ''
+    mypy --disallow-untyped-defs \
+          --no-implicit-optional \
+          --pretty \
+          --no-color-output \
+          --ignore-missing-imports ${src}/test_driver
+    pylint --errors-only --enable=unused-import ${src}/test_driver
+    black --check --diff ${src}/test_driver
+  '';
+}