fix bug 223: SparseMatrix::Flags no longer encode triangularness information
fix bug 223: SparseMatrix::Flags no longer encode triangularness information

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