[serializer] ensure that immortal immovable roots are correctly deserialized.

src/snapshot/deserializer.cc

Index: src/snapshot/deserializer.cc
diff --git a/src/snapshot/deserializer.cc b/src/snapshot/deserializer.cc
index ec755b596e8a99508828deff9127c4dfd3b3bc7d..7a725f8f2b6e6bac1f7870809736748c5876f12a 100644
--- a/src/snapshot/deserializer.cc
+++ b/src/snapshot/deserializer.cc
@@ -82,6 +82,7 @@ void Deserializer::Deserialize(Isolate* isolate) {
 
   {
     DisallowHeapAllocation no_gc;
+    isolate_->heap()->IterateStrongRoots(this, VISIT_ONLY_STRONG_ROOT_LIST);
     isolate_->heap()->IterateSmiRoots(this);
     isolate_->heap()->IterateStrongRoots(this, VISIT_ONLY_STRONG);
     isolate_->heap()->RepairFreeListsAfterDeserialization();