distro/defaultsetup: Enable space optimization tweaks

distro/defaultsetup: Enable space optimization tweaks

This enables a collection of tweaks which reudce build output size where
the output has been found to be particularly problematic.

This reduces sstate object size as well as on disk build footprint, it
also helps memory usage for linking some of the recipes. This in turn
improves built speed and the smaller sstate objects are faster to compress,
decompress and transfer over the network.

This change has been tested in poky for a long time.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>