Rename analyzer_experimental to analyzer.

pkg/analyzer/lib/src/generated/sdk_io.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 library engine.sdk.io;
 import 'java_core.dart';
 import 'java_io.dart';
 import 'java_engine_io.dart';
 import 'source_io.dart';
 import 'error.dart';
 import 'scanner.dart';
 import 'ast.dart';
@@ skipping 546 matching lines @@
     return null;
   }
 }
 class AnalysisErrorListener_10 implements AnalysisErrorListener {
   List<bool> foundError;
   AnalysisErrorListener_10(this.foundError);
   void onError(AnalysisError error) {
     foundError[0] = true;
   }
 }