add work-around for rust-lang#2164

Author: RalfJung

tests/pass/0weak_memory_consistency.rs

@@ -34,10 +34,12 @@ unsafe impl<T> Sync for EvilSend<T> {}
 // multiple times
 fn static_atomic(val: i32) -> &'static AtomicI32 {
     let ret = Box::leak(Box::new(AtomicI32::new(val)));
+    ret.store(val, Relaxed); // work around https://github.com/rust-lang/miri/issues/2164
     ret
 }
 fn static_atomic_bool(val: bool) -> &'static AtomicBool {
     let ret = Box::leak(Box::new(AtomicBool::new(val)));
+    ret.store(val, Relaxed); // work around https://github.com/rust-lang/miri/issues/2164
     ret
 }