- Update emulators/qemu-sbruno to latest github snapshot, fixing
the bsd-user targets on 8 and 9.
- Switch emulators/qemu-user-static to be slave of emulators/qemu-sbruno.
- Update emulators/qemu-devel to latest upstream release 2.2.0, now
w/o bsd-user patches and knob again. (Or at least until the
patches are merged upstream...) 
- Add appropriate CONFLICTS to emulators/qemu too and bump its
Suggested by: andrew  (for the benefit of testing aarch64 guests)