Implement dynamic and void as types exported by core library.

pkg/front_end/lib/src/fasta/kernel/kernel_target.dart

Index: pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
index 8930c17fd8ac9326a0d919f84972f5d9a78239b9..22771a0737ca595694b4e8deb2a5bb7576a9490d 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
@@ -15,6 +15,7 @@ import 'package:kernel/ast.dart'
         Class,
         Constructor,
         DartType,
+        DynamicType,
         EmptyStatement,
         Expression,
         ExpressionStatement,
@@ -220,6 +221,9 @@ class KernelTarget extends TargetImplementation {
     if (loader.first == null) return null;
     try {
       await loader.buildOutlines();
+      loader.coreLibrary
+          .becomeCoreLibrary(const DynamicType(), const VoidType());
+      dynamicType.bind(loader.coreLibrary.members["dynamic"]);
       loader.resolveParts();
       loader.computeLibraryScopes();
       loader.resolveTypes();