Add rpcexplorer to webapp hierarchy.

web/inc/rpcexplorer/test/descriptor.html

Index: web/inc/rpcexplorer/test/descriptor.html
diff --git a/server/static/rpcexplorer/test/descriptor.html b/web/inc/rpcexplorer/test/descriptor.html
similarity index 99%
copy from server/static/rpcexplorer/test/descriptor.html
copy to web/inc/rpcexplorer/test/descriptor.html
index 3821487dd1fff6f125e7bf1779b37494629e1c52..13feb7c640db8c5cc8bd41c0154746ffbb324e98 100644
--- a/server/static/rpcexplorer/test/descriptor.html
+++ b/web/inc/rpcexplorer/test/descriptor.html
@@ -2,7 +2,7 @@
   Copyright 2016 The LUCI Authors. All rights reserved.
   Use of this source code is governed under the Apache License, Version 2.0
   that can be found in the LICENSE file.
-  -->
+-->
 
 <!-- This file is generated by gen.go -->
 
@@ -198,7 +198,7 @@ var testDescriptor = {
               18
             ],
             "leadingDetachedComments": [
-              " Copyright 2016 The LUCI Authors. All rights reserved.\n Use of this source code is governed under the Apache License, Version 2.0\n that can be found in the LICENSE file.\n"
+              " Copyright 2016 The Chromium Authors. All rights reserved.\n Use of this source code is governed by a BSD-style license that can be\n found in the LICENSE file.\n"
             ]
           },
           {