Add module suffix in .mojom files for components/arc

components/arc/common/bluetooth.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module arc;
+module arc.mojom;
 
 [Extensible]
 enum BluetoothAdapterState {
   OFF = 0,
   ON
 };
 
 [Extensible]
 enum BluetoothDiscoveryState {
   STOPPED,
@@ skipping 143 matching lines @@
                            array<BluetoothProperty> properties);
   OnDeviceFound(array<BluetoothProperty> properties);
   OnDiscoveryStateChanged(BluetoothDiscoveryState state);
   OnBondStateChanged(BluetoothStatus status,
                      BluetoothAddress remote_addr,
                      BluetoothBondState state);
   OnAclStateChanged(BluetoothStatus status,
                     BluetoothAddress remote_addr,
                     BluetoothAclState state);
 };