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/coreschema/default.nix

@@ -0,0 +1,34 @@
+{
+  lib,
+  fetchFromGitHub,
+  buildPythonPackage,
+  jinja2,
+  pytest,
+}:
+
+buildPythonPackage rec {
+  pname = "coreschema";
+  version = "0.0.4";
+
+  src = fetchFromGitHub {
+    repo = "python-coreschema";
+    owner = "core-api";
+    rev = version;
+    sha256 = "027pc753mkgbb3r1v1x7dsdaarq93drx0f79ppvw9pfkcjcq6wb1";
+  };
+
+  propagatedBuildInputs = [ jinja2 ];
+
+  checkInputs = [ pytest ];
+  checkPhase = ''
+    cd ./tests
+    pytest
+  '';
+
+  meta = with lib; {
+    description = "Python client library for Core Schema";
+    homepage = "https://github.com/ivegotasthma/python-coreschema";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ ];
+  };
+}