Make remote nodes non-enumerable

Author: mattmarcum

ember_debug/libs/render-tree.js

@@ -165,7 +165,9 @@ class InElementSupportProvider {
   registerRemote(block, node) {
     const obj = this.buildInElementNode(node);
     if (this.currentNode) {
-      this.currentNode.remotes = this.currentNode.remotes || [];
+      if (!this.currentNode.remotes) Object.defineProperty(this.currentNode, 'remotes', {
+        value: []
+      });
       this.currentNode.remotes.push(obj);
     }
     this.remoteRoots.push(obj);