Jenkinsfile: add 'mx6qsabrelite' board

Prepare images for 'mx6qsabrelite' board.

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>
Reviewed-by: Frédéric Dalleau <frederic.dalleau@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D7853