core/tasks/kernel.mk: also install kernel modules when using the ubuntu package

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Signed-off-by: Sergio Schvezov <sergio.schvezov@canonical.com>
Merge commit '22404621eeb297a2ece2172d1c0caf843b6a1e34' into phablet-10.1