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/tools/circup/default.nix

@@ -0,0 +1,52 @@
+{ lib
+, fetchFromGitHub
+, python3
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "circup";
+  version = "1.0.4";
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "adafruit";
+    repo = pname;
+    rev = version;
+    hash = "sha256-qX3kSlqA2qP8+XiLYx/hKYfyeB6p3tnXEhESox0c/lY=";
+  };
+
+  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+
+  nativeBuildInputs = with python3.pkgs; [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = with python3.pkgs; [
+    appdirs
+    click
+    findimports
+    requests
+    semver
+    setuptools
+    update_checker
+  ];
+
+  checkInputs = with python3.pkgs; [
+    pytestCheckHook
+  ];
+
+  postBuild = ''
+    export HOME=$(mktemp -d);
+  '';
+
+  pythonImportsCheck = [
+    "circup"
+  ];
+
+  meta = with lib; {
+    description = "CircuitPython library updater";
+    homepage = "https://github.com/adafruit/circup";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}