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/interpreters/python/update-python-libraries/default.nix

@@ -0,0 +1,12 @@
+{ python3, runCommand, git }:
+
+runCommand "update-python-libraries" {
+  buildInputs = [
+    (python3.withPackages(ps: with ps; [ packaging requests toolz ]))
+    git
+  ];
+} ''
+  cp ${./update-python-libraries.py} $out
+  patchShebangs $out
+  substituteInPlace $out --replace 'GIT = "git"' 'GIT = "${git}/bin/git"'
+''