kernel-resin.bbclass: Add support for aufs5
kernel-resin.bbclass: Add support for aufs5

We add support for aufs on kernels 5.x variants

Change-type: patch
Changelog-entry: Add support for aufs5 on kernel 5.x variants
Signed-off-by: Florin Sarbu <3a837a37a2ac9072a088641ec330e0e5d5b86f4e@balena.io>

resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin