Add an Iterable type to the nonstandard SDK test.

With the new "UI as code" functionality, the analyzer requires any SDK
it analyzes to contain an Iterable type.

Change-Id: Ib098b135665b970040abf9e319b93f36fe09bea8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/96122
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
diff --git a/pkg/analysis_server/test/integration/analysis/get_errors_nonStandard_sdk_test.dart b/pkg/analysis_server/test/integration/analysis/get_errors_nonStandard_sdk_test.dart
index c9be4cd..1ea7f7c 100644
--- a/pkg/analysis_server/test/integration/analysis/get_errors_nonStandard_sdk_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/get_errors_nonStandard_sdk_test.dart
@@ -44,6 +44,7 @@
 class int {}
 class num {}
 class Object {}
+class Iterable<E> {}
 class Map<K, V> {}
 class Null {}
 class String {}