upstart: Add softdog module loading example

Signed-off-by: yuusuke <yusk.iida@gmail.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>
(cherry picked from commit 1d05569fa9820082d5488379f25828c78ccd5f17)

init/corosync.conf.in

@@ -18,6 +18,8 @@ end script
 
 pre-start script
     mkdir -p @LOCALSTATEDIR@/run
+    # rewrite according to environment.
+    #[ -c /dev/watchdog ] || modprobe softdog
 end script
 
 post-start script