Explicitly name all spawned threads

The thread name is shown in debugger as well as panic messages and this
patch makes it easier to follow a thread instead of looking through
full backtrace, by naming all spawned threads according to their
functioning.

crates/vfs-notify/src/lib.rs

@@ -31,7 +31,10 @@ impl loader::Handle for NotifyHandle {
     fn spawn(sender: loader::Sender) -> NotifyHandle {
         let actor = NotifyActor::new(sender);
         let (sender, receiver) = unbounded::<Message>();
-        let thread = jod_thread::spawn(move || actor.run(receiver));
+        let thread = jod_thread::Builder::new()
+            .name("LoaderThread".to_owned())
+            .spawn(move || actor.run(receiver))
+            .expect("failed to spawn thread");
         NotifyHandle { sender, thread }
     }
     fn set_config(&mut self, config: loader::Config) {