library ext error in plugInfo.json on windows

[1xinghuan]

Hi, I found an issue for AL_USDMayaPxrTranslators plugin:

In plugin/AL_USDMayaPxrTranslators/resources/plugInfo.json, the "LibraryPath" is pointing to "../../plugin/AL_USDMayaPxrTranslators.dll" but there's only "AL_USDMayaPxrTranslators.mll".

On windows, the maya plugin ext should be mll and the final build file is ok.

When maya load the plugin, it will raise a plugin load error. Just an error, the plugin itself is fine.

Thanks.