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/pytest-snapshot/default.nix

@@ -0,0 +1,53 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, packaging
+, pytest
+, setuptools-scm
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "pytest-snapshot";
+  version = "0.9.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.5";
+
+  src = fetchFromGitHub {
+    owner = "joseph-roitman";
+    repo = pname;
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-0PZu9wL29iEppLxxbl4D0E4WfOHe61KUUld003cRBRU=";
+  };
+
+  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  buildInputs = [
+    pytest
+  ];
+
+  propagatedBuildInputs = [
+    packaging
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "pytest_snapshot"
+  ];
+
+  meta = with lib; {
+    description = "A plugin to enable snapshot testing with pytest";
+    homepage = "https://github.com/joseph-roitman/pytest-snapshot/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ SuperSandro2000 ];
+  };
+}