As far as I can see the ALAudio module is for Linux and HTML5 only.
When you use
PublicDependencyModuleNames.Add(“ALAudio”);
the UBT is trying to build a registered module which in this case is inside the Runtime/Linux and Runtime/HTML5 directories. I’m not sure if UBT is using those directories when building Win64.
To make it work on Windows you should make a module in Source/Runtime/Windows that implements the OpenAL or try to move it to the Source/Runtime. You can look at libcurl how it is done.
The interesting thing is that I can’t find an ALAudio.cpp file 
I don’t have full sources on this computer, but I know you went to the quite deep engine stuff here 