defaultsetup: Enable uninative by default

defaultsetup: Enable uninative by default

uninative allows reuse of native sstate built on one distro on another. This change
enables it by default, as has been done by default in poky for a long time.

The reason for the change is that this makes the sstate CDN much more useful
to speed up builds if good network access is available. It also standardises
the builds to our usual testing configuration, removing one key difference
which new users sometimes run into.

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>