sstate/staging: Batch log messages for performance
According to profile data, repeated calls to bb.debug and bb.note in
the extend_recipe_sysroot() codepath were accounting for 75% of the time
(1.5s) in calls from tasks like do_image_complete.
This batches up the log messages into one call into the logging system
which gives similar behaviour to disabling the logging but retains the
debug information.
Since setscene_depvalid is also called from bitbake's setscene code,
we have to be a little creative with the function parameters and leave
the other debug output mechanism in place. This should hopefully
speed up recipe specific sysroots.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
