opensaf: install opensafd.service

Fixed when systemd:
ERROR: Function failed: SYSTEMD_SERVICE_opensaf value opensafd.service does not exist

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>