[Ada] Get finalization right when a function returns a function call

gcc/ada/

	* checks.adb (Apply_Predicate_Check): Generate "infinite
	recursion" warning message even if run-time predicate checking
	is disabled.
	* exp_ch6.adb (Expand_Simple_Function_Return): In testing
	whether the returned expression is a function call, look for the
	case where the call has been transformed into a dereference of
	an access value that designates the result of a function call.
	* sem_ch3.adb (Analyze_Object_Declaration): Legality checking
	for a static expression is unaffected by assertion policy (and,
	in particular, enabling/disabling of subtype predicates.  To get
	the right legality checking, we need to call
	Check_Expression_Against_Static_Predicate for a static
	expression even if predicate checking is disabled for the given
	predicate-bearing subtype.  On the other hand, we don't want to
	call Make_Predicate_Check unless predicate checking is enabled.
	* sem_ch7.adb (Uninstall_Declarations.Preserve_Full_Attributes):
	Preserve the Predicates_Ignored attribute.
	* sem_eval.adb (Check_Expression_Against_Static_Predicate):
	Previously callers ensured that this procedure was only called
	if predicate checking was enabled; that is no longer the case,
	so predicates-disabled case must be handled.
	* sem_prag.adb (Analyze_Pragma): Fix bug in setting
	Predicates_Ignored attribute in Predicate pragma case.

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