Store actual Reference(s) for additional exports.

pkg/kernel/lib/binary/ast_from_binary.dart

Index: pkg/kernel/lib/binary/ast_from_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_from_binary.dart b/pkg/kernel/lib/binary/ast_from_binary.dart
index d060020ba003382cd7bb9f95a2a40925c0e378b9..869c1b9c843a978e9025dba1b257921f45d87bf6 100644
--- a/pkg/kernel/lib/binary/ast_from_binary.dart
+++ b/pkg/kernel/lib/binary/ast_from_binary.dart
@@ -387,6 +387,7 @@ class BinaryBuilder {
       _skipNodeList(readExpression);
     }
     _readLibraryDependencies(library);
+    _readAdditionalExports(library);
     _readLibraryParts(library);
     _mergeNamedNodeList(library.typedefs, readTypedef, library);
     _mergeNamedNodeList(library.classes, readClass, library);
@@ -417,6 +418,17 @@ class BinaryBuilder {
     }
   }
 
+  void _readAdditionalExports(Library library) {
+    int numExportedReference = readUInt();
+    if (numExportedReference != 0) {
+      for (int i = 0; i < numExportedReference; i++) {
+        CanonicalName exportedName = readCanonicalNameReference();
+        Reference reference = exportedName.getReference();
+        library.additionalExports.add(reference);
+      }
+    }
+  }
+
   Combinator readCombinator() {
     var isShow = readUInt() == 1;
     var names = readStringReferenceList();