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/packbits/default.nix

@@ -0,0 +1,26 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, pyparsing
+, six
+, pytest
+, pretend
+, lib
+}:
+
+buildPythonPackage rec {
+  pname = "packbits";
+  version = "0.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "bc6b370bb34e04ac8cfa835e06c0484380affc6d593adb8009dd6c0f7bfff034";
+  };
+
+  meta = with lib; {
+    description = "PackBits encoder/decoder for Python";
+    homepage = "https://github.com/psd-tools/packbits";
+    license = [ licenses.mit ];
+    maintainers = with maintainers; [ grahamc ];
+  };
+}