Pointer support in GNATprove leads to spurious messages about global
variables, with local variables declared in local packages and protected
components. Now fixed.

There is no impact on compilation.

2019-07-10  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* sem_aux.adb, sem_aux.ads (Is_Protected_Operation): New
	function to determine if a subprogram is protected.
	* sem_spark.adb (Setup_Protected_Components): New procedure to
	add protected components to the environment.
	(Check_Callable_Body): Call the new Setup_Protected_Components.
	(Check_Package_Spec): Merge local environment with enclosing one
	when done.

From-SVN: r273349