[Audacity-translation] Bug: Incorrect zh.po filename

[You-Cheng H. <yoc...@gm...>]

Hello,
I want to report a bug that the "zh.po" should be named "zh_CN.po"
instead. This bug applied to both 1.2 and 1.3 branches. Please fix it
as soon as possible and release correspond bugfix builds.

Current filename will cause zh_TW translation not be used by program.
And most zh_TW users cannot read zh_CN, they are different language.

Thanks.

You-Cheng Hsieh