Roll Observatory packages and add a roll script

packages/stack_trace/lib/src/frame.dart

 // Copyright (c) 2013, 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.
 
 library frame;
 
 import 'package:path/path.dart' as path;
 
 import 'trace.dart';
 import 'unparsed_frame.dart';
@@ skipping 286 matching lines @@
       return body();
     } on FormatException catch (_) {
       return new UnparsedFrame(text);
     }
   }
 
   Frame(this.uri, this.line, this.column, this.member);
 
   String toString() => '$location in $member';
 }