bitbake: cache.py: print debug info when EXCLUDE_FROM_WORLD
This gives us an easy way to find out which recipes have been excluded
from world when there are many layers.
(Bitbake rev: cf33d4bfc53ae8dc6353fa295e1acd789d4fc2d2)
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>