common: move gossip_store read routine where subdaemons can access it.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

devtools/create-gossipstore.c

@@ -4,11 +4,12 @@
 #include <ccan/opt/opt.h>
 #include <ccan/read_write_all/read_write_all.h>
 #include <common/amount.h>
+#include <common/gossip_store.h>
+#include <common/node_id.h>
 #include <common/type_to_string.h>
 #include <common/utils.h>
 #include <fcntl.h>
 #include <gossipd/gen_gossip_store.h>
-#include <gossipd/gossip_store.h>
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>