More tests for synchronized() {}

compiler/testData/codegen/boxWithStdlib/fullJdk/synchronized/longValue.kt

@@ -0,0 +1,10 @@
+fun box(): String {
+    var obj = "0" as java.lang.Object
+    val result = synchronized (obj) {
+        239L
+    }
+
+    if (result != 239L) return "Fail: $result"
+
+    return "OK"
+}