BUILD: CUDA Use -arch=sm_30 when using CUDA 8 and not COMPUTE_20
BUILD: CUDA Use -arch=sm_30 when using CUDA 8 and not COMPUTE_20

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