message: Add compiler fences to test
diff: -use std::sync::atomic::{fence, AtomicBool, AtomicIsize, AtomicU64, Ordering::*};
  +use std::sync::atomic::{compiler_fence, fence, AtomicBool, AtomicIsize, AtomicU64, Ordering::*};
  fn main() {
  atomic_bool();
  @@ -70,4 +70,8 @@ fn atomic_fences() {
  fence(Release);
  fence(Acquire);
  fence(AcqRel);
  + compiler_fence(SeqCst);
  + compiler_fence(Release);
  + compiler_fence(Acquire);
  + compiler_fence(AcqRel);
  }
  