* cgraph.h (cgraph_node, cgraph_varpool_node): Update docmentation of
	in_other_partition.
	* lto-cgraph.c (referenced_from_other_partition_p,
	reachable_from_other_partition_p): Use in_other_partition flags.
	(output_node, output_varpool_node): COMDAT nodes always have private
	copies and thus are never used from other partition.

	* lto.c (add_cgraph_node_to_partition): Forward declare; walk also
	nodes from same comdat group as well as all comdat functions referenced
	here.
	(add_varpool_node_to_partition, add_references_to_partition): New function.
	(lto_1_1_map): Skip COMDAT fnctions/variables; use add_varpool_node_to_partition;
	clear aux flags when done.
	(lto_promote_cross_file_statics): Do not promote stuff that gets duplicated to
	each ltrans.

From-SVN: r161846