Only add add linker option if compiler is clang
Only add add linker option if compiler is clang

Zhen-hao/cutorch,luketwitter/cutorch,torch/cutorch,LinusU/cutorch,fmassa/cutorch,Schakirov/cutorch_my,hughperkins/cutorch,wickedfoo/cutorch,yvan-sraka/cutorch,soumith/cutorch,torch/cutorch,0wu/cutorch,luketwitter/cutorch,torch/cutorch,Zhen-hao/cutorch,Schakirov/cutorch_my,hughperkins/cutorch,yvan-sraka/cutorch,wickedfoo/cutorch,Moodstocks/cutorch,clementfarabet/cutorch,adamlerer/cutorch,0wu/cutorch,LinusU/cutorch,Moodstocks/cutorch,clementfarabet/cutorch,adamlerer/cutorch