Enforce LF line endings in the git database.

tests/compiler/dart2js/semantic_visitor_test_decl_data.dart

 // Copyright (c) 2015, 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.
 
 part of dart2js.semantics_visitor_test;
 
 const Map<String, List<Test>> DECL_TESTS = const {
   'Function declarations': const [
     const Test(
         '''
@@ skipping 850 matching lines @@
         '''
         const m = 42;
         ''',
         const [
           const Visit(VisitKind.VISIT_TOP_LEVEL_CONSTANT_DECL,
                 element: 'field(m)',
                 constant: 42),
         ]),
   ],
 };