qemu: Set job statsType for external memory snapshot

Any job which is able to provide statistics that can be queried via
virDomainGetJob{Stats,Info} has to set an appropriate statsType.

Without a proper statsType qemuDomainJobInfoToParams and
qemuDomainJobInfoToInfo have no idea what statistics should be sent to
the API caller.

https://bugzilla.redhat.com/show_bug.cgi?id=1688774

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>

src/qemu/qemu_driver.c

@@ -15558,6 +15558,8 @@ qemuDomainSnapshotCreateActiveExternal(virQEMUDriverPtr driver,
         if (!qemuMigrationSrcIsAllowed(driver, vm, false, 0))
             goto cleanup;
 
+        priv->job.current->statsType = QEMU_DOMAIN_JOB_STATS_TYPE_SAVEDUMP;
+
         /* allow the migration job to be cancelled or the domain to be paused */
         qemuDomainObjSetAsyncJobMask(vm, (QEMU_JOB_DEFAULT_MASK |
                                           JOB_MASK(QEMU_JOB_SUSPEND) |