Fix selfadjoint_matrix_vector_product for complex with packet size > 2 (e.g., AVX)
Fix selfadjoint_matrix_vector_product for complex with packet size > 2 (e.g., AVX)

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