* dwarf2read.c (processing_current_prefix): Delete static

	* dwarf2read.c (processing_current_prefix): Delete static
	variable.
	(process_full_comp_unit): Do not set processing_current_prefix.
	(dwarf2_full_name): New function.
	(read_func_scope): Do not set processing_current_prefix.  Use
	determine_prefix.
	(read_structure_type): Do not set processing_current_prefix.  Remove
	unused inner cleanup.
	(process_structure_scope): Do not set processing_current_prefix.
	(read_enumeration_type): Use dwarf2_full_name.
	(determine_class_name): Return a const char *.  Put the result
	on the objfile obstack.  Use dwarf2_full_name.
	(read_namespace_type): New function.
	(read_namespace): Do not create the type here.  Use
	determine_prefix.
	(read_typedef): Use dwarf2_full_name.  Do not pass the name
	to init_type.
	(read_base_type): Do not pass the name to init_type.  Handle
	TYPE_FLAG_NOSIGN.
	(read_unspecified_type): Do not pass the name to init_type.
	(new_symbol): Use dwarf2_full_name instead of
	processing_current_prefix.
	(read_type_die): Do not set processing_current_prefix.  Handle
	DW_TAG_namespace.
	(determine_prefix): Handle specifications.  Return the result
	on the objfile obstack.  Handle unions correctly.