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/python3-gnutls/default.nix

@@ -0,0 +1,52 @@
+{ lib, fetchFromGitHub, substituteAll, buildPythonPackage, isPy3k, gnutls
+, twisted, pyopenssl, service-identity }:
+
+buildPythonPackage rec {
+  pname = "python3-gnutls";
+  version = "3.1.9";
+
+  disabled = !isPy3k;
+
+  src = fetchFromGitHub {
+    owner = "AGProjects";
+    repo = "python3-gnutls";
+    rev = "324b78f7cd3d9fe58c89c7f0b2bf94199bd6a6e5"; # version not tagged
+    sha256 = "sha256-18T8bAHlNERHobsspUFvSC6ulN55nrFFb5aqNwU8T00=";
+  };
+
+  propagatedBuildInputs = [ twisted pyopenssl service-identity ];
+
+  patches = [
+    (substituteAll {
+      src = ./libgnutls-path.patch;
+      gnutlslib = "${lib.getLib gnutls}/lib";
+    })
+   ];
+
+  pythonImportsCheck = [ "gnutls" ];
+
+  meta = with lib; {
+    description = "Python wrapper for the GnuTLS library";
+    homepage = "https://github.com/AGProjects/python3-gnutls";
+    license = licenses.lgpl21Plus;
+    maintainers = with maintainers; [ chanley ];
+    longDescription = ''
+      This package provides a high level object oriented wrapper around libgnutls,
+      as well as low level bindings to the GnuTLS types and functions via ctypes.
+      The high level wrapper hides the details of accessing the GnuTLS library via
+      ctypes behind a set of classes that encapsulate GnuTLS sessions, certificates
+      and credentials and expose them to python applications using a simple API.
+
+      The package also includes a Twisted interface that has seamless intergration
+      with Twisted, providing connectTLS and listenTLS methods on the Twisted
+      reactor once imported (the methods are automatically attached to the reactor
+      by simply importing the GnuTLS Twisted interface module).
+
+      The high level wrapper is written using the GnuTLS library bindings that are
+      made available via ctypes. This makes the wrapper very powerful and flexible
+      as it has direct access to all the GnuTLS internals and is also very easy to
+      extend without any need to write C code or recompile anything.
+
+    '';
+  };
+}