message: Use const thread_local!
diff: @@ -24,7 +24,7 @@ struct JitState {
  }
  thread_local! {
  - static LAZY_JIT_STATE: RefCell<Option<JitState>> = RefCell::new(None);
  + static LAZY_JIT_STATE: RefCell<Option<JitState>> = const { RefCell::new(None) };
  }
  /// The Sender owned by the rustc thread
  