docs/zh_CN: Add translations in zh_CN/kernel-hacking/

Add new translations

* Documentation/translations/zh_CN/kernel-hacking/index.rst
* Documentation/translations/zh_CN/kernel-hacking/hacking.rst

And link them to zh_CN/index.rst.
Signed-off-by: Wu XiangCheng <bobwxc@email.cn>
Reviewed-by: Alex Shi <alex.shi@linux.alibaba.com>
Link: https://lore.kernel.org/r/20210323091651.GA23904@mipcSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/index.rst

@@ -18,6 +18,7 @@
 
    admin-guide/index
    process/index
+   kernel-hacking/index
    filesystems/index
    arm64/index
    sound/index

Documentation/translations/zh_CN/kernel-hacking/index.rst

+.. _kernel_hacking_zh:
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/kernel-hacking/index.rst
+
+:译者:
+
+ 吴想成 Wu XiangCheng <bobwxc@email.cn>
+
+=============
+内核骇客指南
+=============
+
+.. toctree::
+   :maxdepth: 2
+
+   hacking
+
+TODO
+
+- locking