Fix importing builtin libraries in gen_snapshot

runtime/bin/gen_snapshot.cc

Index: runtime/bin/gen_snapshot.cc
diff --git a/runtime/bin/gen_snapshot.cc b/runtime/bin/gen_snapshot.cc
index 06d8a0280a5f5a0526e9fd034f4587d494b6b7e1..be575c180a55201cab60636c5b7e418d5c1e822a 100644
--- a/runtime/bin/gen_snapshot.cc
+++ b/runtime/bin/gen_snapshot.cc
@@ -337,7 +337,7 @@ static Dart_Handle CreateSnapshotLibraryTagHandler(Dart_LibraryTag tag,
   if (builtinId != Builtin::kInvalidLibrary) {
     // Special case for importing a builtin library.
     if (tag == Dart_kImportTag) {
-      return Builtin::LoadAndCheckLibrary(builtinId);
+      return Builtin::LoadLibrary(url, builtinId);
     }
     ASSERT(tag == Dart_kSourceTag);
     return DartUtils::NewError("Unable to part '%s' ", url_string);