kabi: reserve space for posix clock related structure

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4JBL0


CVE: NA

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Reserve space for posix clock related structure.

Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>