* lto-symtab.c (lto_cgraph_replace_node): Release function body.
	* cgraph.c (cgraph_remove_node): Do not release function body
	when in cgraph streaming.
	* ipa.c (process_references, symtab_remove_unreachable_nodes): Objects
	in other partitions are not considered reachable; fix handling of clones.

From-SVN: r201242