make BenchTimer compatible with 2.0 branch
make BenchTimer compatible with 2.0 branch

TSC21/Eigen,ritsu1228/eigen,ritsu1228/eigen,ritsu1228/eigen,toastedcrumpets/eigen,pasuka/eigen,toastedcrumpets/eigen,TSC21/Eigen,Zefz/eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,pasuka/eigen,pasuka/eigen,pasuka/eigen,Zefz/eigen,TSC21/Eigen,ROCmSoftwarePlatform/hipeigen,Zefz/eigen,Zefz/eigen,toastedcrumpets/eigen,ROCmSoftwarePlatform/hipeigen,TSC21/Eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,pasuka/eigen,toastedcrumpets/eigen