The following patch updates the freezing of expressions to insert the
generated freeze nodes prior to the expression that produced them when
the context is a transient scope within a type initialization procedure.
This ensures that the nodes are properly interleaved with respect to the
constructs that generated them.

2019-07-01  Hristian Kirtchev  <kirtchev@adacore.com>

gcc/ada/

	* freeze.adb (Freeze_Expression): Remove the horrible useless
	name hiding of N. Insert the freeze nodes generated by the
	expression prior to the expression when the nearest enclosing
	scope is transient.

gcc/testsuite/

	* gnat.dg/freezing1.adb, gnat.dg/freezing1.ads,
	gnat.dg/freezing1_pack.adb, gnat.dg/freezing1_pack.ads: New
	testcase.

From-SVN: r272854