ada: Reset scope of top level object declaration during unnesting

ada: Reset scope of top level object declaration during unnesting

When unnesting, the compiler gathers elaboration code and wraps it with
a new dedicated procedure. While doing so, it resets the scopes of
entities that are wrapped to point to this new procedure. This change
also resets the scopes of N_Object_Declaration and
N_Object_Renaming_Declaration nodes only if an elaboration procedure
is needed.

gcc/ada/

	* exp_ch7.adb (Reset_Scopes_To_Block_Elab_Proc): also reset scope
	for object declarations.