The recent inotify changes can cause entire build trees to be monitored
which is suboptimal for performance.
Rather than trying increasingly convoluted tricks to try and handle add/removed
directories, rebuild the inotify watch when we reparse the configuration or
metadata.
(Bitbake rev: 3df322a200c28b45af1f2c92478c85eb7d20c38b)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>