At end of BBCooker needs to release fd's associated with pyinotify
watchers to avoid: Too many open files (EMFILE) error in different
scenarios like several instances of tinfoil.
[YOCTO #10873]
(Bitbake rev: ae6045b84978940c365c95c33d6996359c3e299d)
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>