[oe] Yet another set of 'world' build cleanups

[Marcin Juszkiewicz]

I know that meta-oe is not granted to build world buildable. But it is
nice to be able to run "bitbake world" and have it done something other
then complaining about broken build dependencies.

Parts of that changeset were sent to ML in past but this time I took a
bit of time to clean them.

I moved few recipes to other layers, dropped few and changed some build
dependencies. Not granted that those patches are proper way to do it.