sem_ch7.adb (Analyze_Package_Specification): Insert its freezing nodes after the...

sem_ch7.adb (Analyze_Package_Specification): Insert its freezing nodes after the last declaration.

2016-07-06  Javier Miranda  <miranda@adacore.com>

	* sem_ch7.adb (Analyze_Package_Specification): Insert its
	freezing nodes after the last declaration. Needed to ensure
	that global entities referenced in aspects of frozen types are
	properly handled.
	* freeze.adb (Freeze_Entity): Minor code reorganization to ensure
	that freezing nodes of generic packages are handled.
	* sem_ch13.adb (Freeze_Entity_Checks): Handle N_Freeze_Generic nodes.
	* sem_ch12.adb (Save_References_In_Identifier): Handle selected
	components which denote a named number that is constant folded
	in the analyzed copy of the tree.

From-SVN: r238047