Export sysboml for bbox to use.

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4D63I


CVE: NA

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Export console_flush_on_panic for bbox to use.

Signed-off-by: Xu Qiang <xuqiang36@huawei.com>
Signed-off-by: Fang Lijun <fanglijun3@huawei.com>
Reviewed-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>