Disable SFINAE for versions of gcc older than 4.8
Disable SFINAE for versions of gcc older than 4.8

ROCmSoftwarePlatform/hipeigen,pasuka/eigen,pasuka/eigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,pasuka/eigen,ritsu1228/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,ritsu1228/eigen