docs/zh_CN: add the translations of kbuild/reproducible-builds.rst

docs/zh_CN: add the translations of kbuild/reproducible-builds.rst

Finish the translation of kbuild/reproducible-builds.rst and move
reproducible-builds.rst from TODO to the main body.

Update to commit 114ff6fe6cfb ("Documentation: kbuild: Add description
of git for reproducible builds")

Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn>
Link: https://lore.kernel.org/r/dcd09bf28f52ba0461b26f800fdbb145c879a313.1729259177.git.dzm91@hust.edu.cn
Reviewed-by: Yanteng Si <si.yanteng@linux.dev>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>