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/flask-mail/default.nix

@@ -0,0 +1,24 @@
+{ lib, buildPythonPackage, fetchPypi,
+  blinker, flask, mock, nose, speaklater
+}:
+
+buildPythonPackage rec {
+  pname = "Flask-Mail";
+  version = "0.9.1";
+
+  meta = {
+    description = "Flask-Mail is a Flask extension providing simple email sending capabilities.";
+    homepage = "https://pypi.python.org/pypi/Flask-Mail";
+    license = lib.licenses.bsd3;
+  };
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0hazjc351s3gfbhk975j8k65cg4gf31yq404yfy0gx0bjjdfpr92";
+  };
+
+  propagatedBuildInputs = [ blinker flask ];
+  buildInputs = [ blinker mock nose speaklater ];
+
+  doCheck = false;
+}