docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation

Translate dev-tools/gdb-kernel-debugging.rst into Chinese.

Signed-off-by: gaochao <gaochao49@huawei.com>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/20220514100046.1683-1-gaochao49@huawei.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>