* sem_ch3.adb: (Build_Derived_Record_Type) Remove the kludgy update of
access discriminant and anonymous access component scopes.
(Inherit_Component): Reuse the itype of an access discriminant
or anonymous access component by copying it in order to set the proper
scope. This is done only when the parent and the derived type
are in different scopes.
(Set_Anonymous_Etype): New routine.