extra - en to zh_CN translation catalogue (3 entries)

en: elementary Icons
zh_CN: elementary 图标

en: Named, vector icons for elementary OS
zh_CN: elementary OS 的命名矢量图标

en: An original set of vector icons designed specifically for elementary OS and its desktop environment: Pantheon.
zh_CN: 专为 elementary OS 与其桌面环境 Pantheon 设计的原创矢量图标。
