l10n: zh_CN: for git v2.16.0 l10n round 2

Translate 72 messages (3288t0f0u) for git v2.16.0-rc1.

Signed-off-by: Jiang Xin <[email protected]>
Reviewed-by: 依云 <[email protected]>
Reviewed-by: Fangyi Zhou <[email protected]>

Author: jiangxin