Add boards/ && cargo clippy

os/src/task/processor.rs

@@ -25,7 +25,7 @@ impl Processor {
         self.current.take()
     }
     pub fn current(&self) -> Option<Arc<TaskControlBlock>> {
-        self.current.as_ref().map(|task| Arc::clone(task))
+        self.current.as_ref().map(Arc::clone)
     }
 }