ada: Cannot requeue to a procedure implemented by an entry

Add missing support for RM 9.5.4(5.6/4): the target of a requeue
statement may be a procedure when its name denotes a renaming of
an entry.

gcc/ada/

	* sem_ch6.adb (Analyze_Subprogram_Specification): Do not replace
	the type of the formals with its corresponding record in
	init-procs.
	* sem_ch9.adb (Analyze_Requeue): Add missing support to requeue to
	a procedure that denotes a renaming of an entry.