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/pyblake2/default.nix

@@ -0,0 +1,23 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "pyblake2";
+  version = "1.1.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "5ccc7eb02edb82fafb8adbb90746af71460fbc29aa0f822526fc976dff83e93f";
+  };
+
+  # requires setting up sphinx doctest
+  doCheck = false;
+
+  meta = {
+    description = "BLAKE2 hash function extension module";
+    license = lib.licenses.publicDomain;
+    homepage = "https://github.com/dchest/pyblake2";
+  };
+}