Update locales-zh-CN.xml

This one is based on the recently updated and committed zh-TW locale. 

Specifically for the CN locale,《》and〈〉have been set as inner and outer quotes under punctuation, and the term 公元 is used to translate AD.
Update locales-zh-CN.xml

Amended the ordinal to >< without empty string.
Merge pull request #80 from sati-bodhi/master

Update locales-zh-CN.xml