Revert previous delta to debug.c. Replace with patch to reject indirect types...

Revert previous delta to debug.c.  Replace with patch to reject indirect types that point to indirect types.

	PR 28718
	* dwarf.c: Revert previous delta.
	(debug_get_real_type): Reject indirect types that point to
	indirect types.
	(debug_get_type_name, debug_get_type_size, debug_write_type):
	Likewise.