Implement dynamic and void as types exported by core library.

pkg/analyzer/lib/src/fasta/element_store.dart

Index: pkg/analyzer/lib/src/fasta/element_store.dart
diff --git a/pkg/analyzer/lib/src/fasta/element_store.dart b/pkg/analyzer/lib/src/fasta/element_store.dart
index 0436db3ed03dbb990a04131fdceda92f2c58e969..8d90278471a5d78ae013a6ced8d4164fbb332683 100644
--- a/pkg/analyzer/lib/src/fasta/element_store.dart
+++ b/pkg/analyzer/lib/src/fasta/element_store.dart
@@ -88,6 +88,8 @@ class ElementStoreImplementation implements ElementStore {
             }
           } else if (builder is KernelProcedureBuilder) {
             buildKernelFunctionElement(builder, unit, elements);
+          } else if (builder is BuiltinTypeBuilder) {
+            // TODO(ahe): Set up elements for dynamic and void.
           } else {
             internalError("Unhandled $name ${builder.runtimeType} in $uri");
           }