COMP: Do not link Python libraries on Unix when building wheels
COMP: Do not link Python libraries on Unix when building wheels

"Weak linking", i.e., not linking at all, is required for compatibility.

thewtex/TubeTK,aylward/ITKTubeTK,thewtex/TubeTK,thewtex/TubeTK,aylward/ITKTubeTK,aylward/ITKTubeTK,aylward/ITKTubeTK,thewtex/TubeTK