gdb/

gdb/
	Fix duplicate types for single DIE.
	* dwarf2read.c (read_structure_type): Move set_descriptive_type after
	set_die_type.
	(read_array_type): Remove type initialization.  Recheck get_die_type
	after initial die_type.  Move set_die_type before set_descriptive_type.
	(read_set_type): New variable domain_type.  Recheck get_die_type after
	initial die_type.  Move attr initialization later.
	(read_tag_pointer_type, read_tag_reference_type): New variable
	target_type.  Recheck get_die_type after initial die_type.
	(read_tag_ptr_to_member_type): Recheck get_die_type after initial
	die_type and die_containing_type.
	(read_tag_const_type, read_tag_volatile_type, read_subroutine_type):
	Recheck get_die_type after initial die_type.
	(read_subrange_type): Recheck get_die_type after initial die_type.
	Move set_die_type before set_descriptive_type.
	(set_die_type): Extend the function comment.  Call complaint if DIE has
	some type already set.