Update xccdf_policy internal structures when selector is added.
Update xccdf_policy internal structures when selector is added.

jan-cerny/openscap,mpreisler/openscap,isimluk/openscap,postfix/openscap,postfix/openscap,openprivacy/openscap,isimluk/openscap,mpreisler/openscap,jan-cerny/openscap,Hexadorsimal/openscap,openprivacy/openscap,isimluk/openscap,redhatrises/openscap,ybznek/openscap,openprivacy/openscap,jan-cerny/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,isimluk/openscap,redhatrises/openscap,jan-cerny/openscap,openprivacy/openscap,redhatrises/openscap,ybznek/openscap,redhatrises/openscap,OpenSCAP/openscap,mpreisler/openscap,Hexadorsimal/openscap,isimluk/openscap,postfix/openscap,jan-cerny/openscap,redhatrises/openscap,postfix/openscap,Hexadorsimal/openscap,mpreisler/openscap,isimluk/openscap,OpenSCAP/openscap,redhatrises/openscap,mpreisler/openscap,OpenSCAP/openscap,openprivacy/openscap,ybznek/openscap,openprivacy/openscap,ybznek/openscap,ybznek/openscap,mpreisler/openscap,ybznek/openscap,postfix/openscap,OpenSCAP/openscap,postfix/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,jan-cerny/openscap