cgraphunit.c (handle_alias_pairs): Declare; free alias_pairs

cgraphunit.c (handle_alias_pairs): Declare; free alias_pairs

	* cgraphunit.c (handle_alias_pairs): Declare; free alias_pairs
	(cgraph_process_new_functions): Process also aliases.
	* lto-streamer-out.c (struct sets): Remove.
	(trivally_defined_alias): Remove.
	(output_alias_pair_p): Remove.
	(output_unreferenced_globals): Remove.
	(produce_symtab); Do not handle alias pairs.
	(produce_asm_for_decls): Likewise.
	* lto-streamer-in.c (input_alias_pairs): Remove.
	(lto_read_body): Do not input alias pairs.
	(lto_input_constructors_and_inits): Remove.

From-SVN: r187681