ada: Couple of cleanups in finalization machinery

ada: Couple of cleanups in finalization machinery

This removes a parameter and a variable that are entirely determined by
another parameter and another variable respectively.

gcc/ada/

	* exp_ch7.ads (Build_Finalizer): Remove Top_Decls parameter.
	* exp_ch7.adb (Build_Finalizer): Likewise. Rename Counter_Val into
	Count, replace Has_Ctrl_Objs local variable by expression
	function, remove Spec_Decls local variable and do not reset
	Finalizer_Decls.
	(Expand_Cleanup_Actions): Adjust call to Build_Finalizer.
	(Expand_N_Package_Body): Likewise.
	(Expand_N_Package_Declaration): Likewise.
	* inline.adb (Cleanup_Scopes): Likewise.