oe/utils.py: Add support for init/end helper functions in ThreadWorker.
Add init/end helper functions for ThreadWorker also pass ThreadWorker
as first argument to init/end/func functions this enables per-thread
storage handling.
classes/sstate.bbclass: Add thread_worker argument to checkstatus
function.
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>