add custom implementation of hypot
add custom implementation of hypot

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