convert SwSortElements to boost::ptr_multiset
convert SwSortElements to boost::ptr_multiset

Change-Id: Ia52f23a4bdad60a89c70e47089a82ef5dbd8dfda

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core