[oe] [STABLE] some updates from my queue

[Marcin Juszkiewicz]

Hi

This set of changes do following things:

1. Adds "coreutils-native" to mandatory deps so we get sane GNU tools on
   each system. No more 'install' problems. We need this for ifplugd
   recipe.
2. Task-proper-tools got some extra tools.
3. Netcat (part of task-proper-tools) do not conflict with BusyBox
   anymore.