fix dartanalyzer sdk setup

pkg/analyzer_cli/test/embedder_test.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:io';
 
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer_cli/src/driver.dart' show Driver, errorSink, outSink;
 import 'package:path/path.dart' as path;
@@ skipping 55 matching lines @@
       await f();
     } catch (e) {
       if (outSink.toString().isNotEmpty) {
         print('stdout:');
         print(outSink);
       }
       if (errorSink.toString().isNotEmpty) {
         print('stderr:');
         print(errorSink);
       }
-      throw e;
+      rethrow;
     }
   };
 }