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/sentencepiece/default.nix

@@ -0,0 +1,18 @@
+{ buildPythonPackage
+
+, sentencepiece
+, pkg-config
+}:
+
+buildPythonPackage rec {
+  pname = "sentencepiece";
+  inherit (sentencepiece) version src;
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ sentencepiece.dev ];
+
+  sourceRoot = "source/python";
+
+  # sentencepiece installs 'bin' output.
+  meta = builtins.removeAttrs sentencepiece.meta [ "outputsToInstall" ];
+}