l10n: Update zh_CN translation for Git 1.7.10-rc1
l10n: Update zh_CN translation for Git 1.7.10-rc1

Translate 1 new message from Git 1.7.10-rc1: "Gitdir '$a' is ..."

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

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