re PR ada/11978 (ada compiler crashes in a-tags.adb)

re PR ada/11978 (ada compiler crashes in a-tags.adb)

	PR ada/11978:
	* exp_ch13.adb (Expand_N_Freeze_Entity): Do not consider inherited
	External_Tag attribute definition clauses.

	PR ada/7613:
	* exp_dbug.adb (Debug_Renaming_Declaration): For the renaming of a
	child unit, generate a fully qualified name to avoid spurious errors
	when the context contains renamings of different child units with
	the same simple name.

	* exp_dbug.ads: Add documentation on name qualification for renamings
	of child units.

	* g-regpat.ads, g-regpat.adb: Minor reformatting

	* Makefile.in: Use the file 1atags.ads with the ZFP and cert run-times.

	* trans.c: (tree_transform, case N_Real_Literal): Add extra arg to
	Machine call.

	* urealp.h: (Machine): Update to proper definition.

From-SVN: r72843