In case anyone else is trying to do this, I got it to work!
First, the libs need the VoiceData files NOT in nested structure, I copied all the individual files into the Resources folder. When the app builds, those files will all end up in the root of the app. As a side, it makes the directory structure in the app kind of ugly, but anyways.
Secondly, probably due to the way rubymotion tries to figure out what to import, I couldn’t use the 2 frameworks separately. Also, the number of header files made gen_bridge_metadata (the utiltiy for osx to figure out what’s in a framework) choke.
So, I reformed the framework, with just the 2 libraries (OpenEars, NeatSpeech), all the Header files from NeatSpeech (only 2) and whatever Headers I thought were important from OpenEars. Obviously, I guessed the latter, but since I only want playback I picked: FliteController.h and FliteVoice.h.