Fix generalized symm eigensolver (I don't know why the eigenvectors were normalized)
Fix generalized symm eigensolver (I don't know why the eigenvectors were normalized)

madlib/eigen_backup,madlib/eigen_backup,rotorliu/eigen,mjbshaw/Eigen,mjbshaw/Eigen,madlib/eigen_backup,rotorliu/eigen,rotorliu/eigen,rotorliu/eigen,madlib/eigen_backup,mjbshaw/Eigen,mjbshaw/Eigen