l10n: zh_CN.po: translate 27 new messages
l10n: zh_CN.po: translate 27 new messages

Translate 19 new and 8 fuzzy messages which are marked by shell gettext
wrappers, and ignored by previous 'git.pot' updates.

Signed-off-by: Jiang Xin <61b5e6324abee2d58ba2cf49f31c723faf6fd946@gmail.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git