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/mistune/common.nix

@@ -0,0 +1,19 @@
+{ lib, buildPythonPackage, fetchPypi, nose, version, sha256, format ? "setuptools" }:
+
+buildPythonPackage rec {
+  inherit version format;
+  pname = "mistune";
+
+  src = fetchPypi {
+    inherit pname version sha256;
+  };
+
+  buildInputs = [ nose ];
+  pythonImportsCheck = [ "mistune" ];
+
+  meta = with lib; {
+    description = "The fastest markdown parser in pure Python";
+    homepage = "https://github.com/lepture/mistune";
+    license = licenses.bsd3;
+  };
+}

pkgs/development/python-modules/mistune/default.nix

@@ -0,0 +1,12 @@
+self: rec {
+  mistune_0_8 = self.callPackage ./common.nix {
+    version = "0.8.4";
+    sha256 = "59a3429db53c50b5c6bcc8a07f8848cb00d7dc8bdb431a4ab41920d201d4756e";
+  };
+  mistune_2_0 = self.callPackage ./common.nix {
+    version = "2.0.2";
+    sha256 = "sha256-b8iMPLSduosWaHtBcl5mHPhXhMEuiXSim50zbdWWw6E=";
+    format = "pyproject";
+  };
+  mistune = mistune_0_8;
+}