ci: Always enable -Werror and show the log on failure
ci: Always enable -Werror and show the log on failure

Let's keep the Meson invocation consistent across jobs.

Signed-off-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>

libvirt/libvirt-glib,libvirt/libvirt-glib,libvirt/libvirt-glib