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/yoyo-migrations/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, setuptools
+, sqlparse
+, tabulate
+}:
+
+buildPythonPackage rec {
+  pname = "yoyo-migrations";
+  version = "7.3.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-RIQIKOGgFp9UHnAtWu3KgYWtpoCH57rUhQpvxdced6Q=";
+  };
+
+  propagatedBuildInputs = [ setuptools sqlparse tabulate ];
+
+  doCheck = false; # pypi tarball does not contain tests
+
+  pythonImportsCheck = [ "yoyo" ];
+
+  meta = with lib; {
+    description = "Database schema migration tool";
+    homepage = "https://ollycope.com/software/yoyo";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ prusnak ];
+  };
+}