Use get_target_propterty to set INCLUDE_DIRS for nvcc
Use get_target_propterty to set INCLUDE_DIRS for nvcc

Using generator expressions doesn't work until CMake version 3.6.0. To
retain minimum CMake version of 3.5.1, generator expression based join
command has been replaced with this change.

9prady9/arrayfire,arrayfire/arrayfire,umar456/arrayfire,umar456/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,umar456/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,arrayfire/arrayfire,umar456/arrayfire,9prady9/arrayfire