Correcting the native name of Lao.

Both "ພາສາລາວ" and "ລາວ" are acceptable as the language's native name, when the former means "Lao language" and the latter means "Lao".
Take a look of http://lo.wikipedia.org/wiki/%E0%BB%81%E0%BA%A1%E0%BB%88%E0%BB%81%E0%BA%9A%E0%BA%9A:%E0%BA%9E%E0%BA%B2%E0%BA%AA%E0%BA%B2%E0%BB%84%E0%BA%97%E0%BA%81%E0%BA%B0%E0%BB%84%E0%BA%94.
In the template, the language is referred as "ລາວ".