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/sane/default.nix

@@ -0,0 +1,27 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, sane-backends
+}:
+
+buildPythonPackage rec {
+  pname = "sane";
+  version = "2.9.1";
+
+  src = fetchPypi {
+    inherit version;
+    pname = "python-sane";
+    sha256 = "JAmOuDxujhsBEm5q16WwR5wHsBPF0iBQm1VYkv5JJd4=";
+  };
+
+  buildInputs = [
+    sane-backends
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/python-pillow/Sane";
+    description = "Python interface to the SANE scanner and frame grabber ";
+    license = licenses.mit;
+    maintainers = with maintainers; [ doronbehar ];
+  };
+}