remove litecoin mention from title in chinese locale

Related to https://github.com/dogecoin/dogecoin/issues/251 and https://github.com/dogecoin/dogecoin/issues/200

I don't speak Chinese @huajinn and i see reference to 莱特币 in multiple places in the document.  If you don't know how to make a PR, please look at https://github.com/rromanchuk/dogecoin/blob/master-1.5/src/qt/locale/bitcoin_zh_CN.ts and and send me the fixes and I will do it for you.