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/tools/chefdk/Gemfile

@@ -0,0 +1,17 @@
+source 'https://rubygems.org'
+
+gem 'chef-dk', '4.13.3'
+gem 'pry'
+gem 'test-kitchen'
+gem 'inspec'
+gem 'kitchen-inspec'
+gem 'kitchen-vagrant'
+gem 'berkshelf'
+gem 'chef-vault'
+gem 'foodcritic'
+gem 'ohai'
+gem 'rubocop'
+gem 'knife-spork'
+gem 'fauxhai-ng'
+gem 'chefspec'
+gem 'chef-provisioning'