Update ChangeLog files as requested for cgraph change to checked down cast.

Index: gcc/cp/ChangeLog

2012-10-31  Lawrence Crowl  <crowl@google.com>

	* decl2.c (var_finalized_p): Rename varpool_node to
	varpool_node_for_decl.
	(maybe_emit_vtables): Likewise.

Index: gcc/ada/ChangeLog

2012-10-31  Lawrence Crowl  <crowl@google.com>

	* gcc-interface/utils.c (gnat_write_global_declarations):
	Rename varpool_node to varpool_node_for_decl.

Index: gcc/lto/ChangeLog

2012-10-31  Lawrence Crowl  <crowl@google.com>

	* lto.c (lto_wpa_write_files): Change symtab checking to a checked
	down-cast via dyn_cast.
	* lto-partition.c (add_symbol_to_partition_1): Likewise.
	(undo_partition): Likewise.
	(lto_balanced_map): Likewise.
	(get_symbol_class): Likewise and via is_a.
	(lto_balanced_map): Change symtab checking to is_a.

From-SVN: r193106