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-silk/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, flask
+}:
+
+buildPythonPackage {
+  pname = "Flask-Silk";
+  version = "unstable-2018-06-28";
+
+  # master fixes flask import syntax and has no major changes
+  # new release requested: https://github.com/sublee/flask-silk/pull/6
+  src = fetchFromGitHub {
+    owner = "sublee";
+    repo = "flask-silk";
+    rev = "3a8166550f9a0ec52edae7bf31d9818c4c15c531";
+    sha256 = "0mplziqw52jfspas6vsm210lmxqqzgj0dxm8y0i3gpbyyykwcmh0";
+  };
+
+  propagatedBuildInputs = [
+    flask
+  ];
+
+  meta = with lib; {
+    description = "Adds silk icons to your Flask application or module, or extension";
+    license = licenses.bsd3;
+    maintainers = teams.sage.members;
+    homepage = "https://github.com/sublee/flask-silk";
+  };
+}