Compilation fix for VS2015: Add missing static definitions in cuda math.hpp
Compilation fix for VS2015: Add missing static definitions in cuda math.hpp

Continues e36a028. Had missed checking CPU and CUDA compilation.

umar456/arrayfire,shehzan10/arrayfire,umar456/arrayfire,9prady9/arrayfire,munnybearz/arrayfire,shehzan10/arrayfire,umar456/arrayfire,umar456/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,shehzan10/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,arrayfire/arrayfire,shehzan10/arrayfire,9prady9/arrayfire,munnybearz/arrayfire,arrayfire/arrayfire,munnybearz/arrayfire