Update baseline tests to support legacy folder

Author: rbuckton

Diff for: baselines/ts5.5/audioworklet.asynciterable.generated.d.ts

@@ -0,0 +1,8 @@
+/////////////////////////////
+/// AudioWorklet Async Iterable APIs
+/////////////////////////////
+
+interface ReadableStream<R = any> {
+    [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): AsyncIterableIterator<R>;
+    values(options?: ReadableStreamIteratorOptions): AsyncIterableIterator<R>;
+}