Rename "pathos" package to "path".

pkg/path/test/posix_test.dart

Index: pkg/path/test/posix_test.dart
diff --git a/pkg/pathos/test/pathos_posix_test.dart b/pkg/path/test/posix_test.dart
similarity index 99%
rename from pkg/pathos/test/pathos_posix_test.dart
rename to pkg/path/test/posix_test.dart
index a446f767e700cf37d739abf907b582e7800e2411..f3232bc818e9f67a1812c2b57aefcfa3b6b29789 100644
--- a/pkg/pathos/test/pathos_posix_test.dart
+++ b/pkg/path/test/posix_test.dart
@@ -2,10 +2,10 @@
 // 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 pathos_posix_test;
+library path.test.posix_test;
 
 import 'package:unittest/unittest.dart';
-import 'package:pathos/path.dart' as path;
+import 'package:path/path.dart' as path;
 
 main() {
   var builder = new path.Builder(style: path.Style.posix, root: '/root/path');