Enforce LF line endings in the git database.

tests/compiler/dart2js/backend_dart/end2end_test.dart

 // Copyright (c) 2014, 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.
 
 /// End-to-end test of the dart2dart compiler.
 library dart_backend.end2end_test;
 
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/dart2jslib.dart';
 import 'package:compiler/src/dart_backend/dart_backend.dart';
@@ skipping 17 matching lines @@
     compiler.phase = Compiler.PHASE_COMPILING;
     DartBackend backend = compiler.backend;
     backend.assembleProgram();
     String output = outputCollector.getOutput('', 'dart').trim();
     Expect.equals(expectedOutput, output,
         '\nInput:\n${result.input}\n'
         'Expected:\n$expectedOutput\n'
         'Actual:\n$output\n');
   }));
 }