Fix lo_space initialization for external snapshot

src/snapshot-external.cc

Index: src/snapshot-external.cc
diff --git a/src/snapshot-external.cc b/src/snapshot-external.cc
index 838e93f1df0aee3e01aefa605e9fd56e118132e8..b75e232295096aa124a537b4aa1d0fb4e8f16734 100644
--- a/src/snapshot-external.cc
+++ b/src/snapshot-external.cc
@@ -136,6 +136,7 @@ void SetSnapshotFromFile(StartupData* snapshot_blob) {
   snapshot_impl_->context_map_space_used = source.GetInt();
   snapshot_impl_->context_cell_space_used = source.GetInt();
   snapshot_impl_->context_property_cell_space_used = source.GetInt();
+  snapshot_impl_->context_lo_space_used = source.GetInt();
 
   DCHECK(success);
 }