ada: Fix (again) incorrect handling of Aggregate aspect

ada: Fix (again) incorrect handling of Aggregate aspect

Previous fix stopped the processing of the Aggregate aspect early,
skipping the call to Record_Rep_Item, making later call to
Resolve_Container_Aggregate fail.

Also, the previous fix would not handle correctly the case where the
type is private and the check for non-array type can only be done at the
freeze point with the full type.

Adapt the resolving of the aspect when the input is not correct and the
parameters can't be resolved.

gcc/ada/

	* sem_ch13.adb (Analyze_One_Aspect): Call Record_Rep_Item.
	(Check_Aspect_At_Freeze_Point): Check the aspect is specified on
	non-array type only...
	(Analyze_One_Aspect): ... instead of doing it too early here.
	* sem_aggr.adb (Resolve_Container_Aggregate): Do nothing in case
	the parameters failed to resolve.