qemu: Align dump options for watchdog and on_crash events

Having on_crash set to either coredump-destroy or coredump-restart
creates core dumps with option memory-only in the directory specified
by auto_dump_path. When a watchdog is triggered with the action dump
the core dump is also placed into the directory specified by auto_dump_path
but is created without the option memory-only.

This patch sets the option memory-only also for core dumps created by the
watchdog event.
Signed-off-by: NBoris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: NBjoern Walk <bwalk@linux.vnet.ibm.com>
Reviewed-by: NStefan Zimmermann <stzi@linux.vnet.ibm.com>

src/qemu/qemu_driver.c

@@ -3957,7 +3957,7 @@ static void processWatchdogEvent(virQEMUDriverPtr driver, virDomainObjPtr vm, in
     case VIR_DOMAIN_WATCHDOG_ACTION_DUMP:
         {
             char *dumpfile;
-            unsigned int flags = 0;
+            unsigned int flags = VIR_DUMP_MEMORY_ONLY;
 
             if (virAsprintf(&dumpfile, "%s/%s-%u",
                             cfg->autoDumpPath,