notifiers: Rename run and wait functions.

It makes more sense to call nln_notifier_run() and
nln_notifier_wait() simply nln_run() and nln_wait() since they
don't operate on notifiers but the entire nln object.  This patch
changes the nln and the rtnetlink-link modules to the new
convention.

lib/netdev-linux.c

@@ -469,14 +469,14 @@ netdev_linux_init(void)
 static void
 netdev_linux_run(void)
 {
-    rtnetlink_link_notifier_run();
+    rtnetlink_link_run();
     netdev_linux_miimon_run();
 }
 
 static void
 netdev_linux_wait(void)
 {
-    rtnetlink_link_notifier_wait();
+    rtnetlink_link_wait();
     netdev_linux_miimon_wait();
 }