support/testing: enable lpxelinux for syslinux runtime test
The syslinux runtime test (which is in fact a build-only test) ensures
that syslinux does get build at least once a week (via the gitlab-CI
weekly pipeline). Runtime testing would need much more work, though, but
nothing in syslinux is currently runtime tested anyway.
Reported-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Yann E. MORIN <yann.morin@orange.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>