Fix building x86_64 on Android.

Missed a define in x64MemTools for when the thought process was Android == ARM
Also changes the variable we use for choosing which folders to copy to and from our jni file.
This has changed since the x86_64 build target uses the library folder x86-64, which is stupid and annoying.
3Could we actually detect if __linux__ or something like that and have #else #error "Unsupported"?