Merging/replacement of Audio implementation with one from RBDOOM-3-BFG.
Changed OpenAL audio naming to match the ones from RBDOOM-3-BFG, which makes more sense.
Switched to being able to get the OpenAL device as opposed to context within i_sound_qnx, since that's all we need anyway.
Finished functionality to get channels and create the channel mask.
Using code from RBDOOM-3-BFG, finished AL_SoundHardware