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/pexpect/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, ptyprocess
+}:
+
+buildPythonPackage (rec {
+  pname = "pexpect";
+  version = "4.8.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "fc65a43959d153d0114afe13997d439c22823a27cefceb5ff35c2178c6784c0c";
+  };
+
+  # Wants to run pythonin a subprocess
+  doCheck = false;
+
+  propagatedBuildInputs = [ ptyprocess ];
+
+  meta = with lib; {
+    homepage = "http://www.noah.org/wiki/Pexpect";
+    description = "Automate interactive console applications such as ssh, ftp, etc";
+    license = licenses.mit;
+    maintainers = with maintainers; [ zimbatm ];
+
+    longDescription = ''
+      Pexpect is similar to the Don Libes "Expect" system, but Pexpect
+      as a different interface that is easier to understand. Pexpect
+      is basically a pattern matching system. It runs programs and
+      watches output. When output matches a given pattern Pexpect can
+      respond as if a human were typing responses. Pexpect can be used
+      for automation, testing, and screen scraping. Pexpect can be
+      used for automating interactive console applications such as
+      ssh, ftp, passwd, telnet, etc. It can also be used to control
+      web applications via "lynx", "w3m", or some other text-based web
+      browser. Pexpect is pure Python. Unlike other Expect-like
+      modules for Python Pexpect does not require TCL or Expect nor
+      does it require C extensions to be compiled. It should work on
+      any platform that supports the standard Python pty module.
+    '';
+  };
+})