Added GN target for webrtc_opus_fec_test.

webrtc/modules/audio_coding/codecs/opus/opus.gypi

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'targets': [
@@ skipping 40 matching lines @@
     },
   ],
   'conditions': [
     ['include_tests==1', {
       'targets': [
         {
           'target_name': 'webrtc_opus_fec_test',
           'type': 'executable',
           'dependencies': [
             'webrtc_opus',
+            '<(webrtc_root)/base/base.gyp:rtc_base',
             '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
             '<(webrtc_root)/test/test.gyp:test_support_main',
             '<(DEPTH)/testing/gtest.gyp:gtest',
           ],
           'sources': [
             'opus_fec_test.cc',
           ],
         },
       ],
     }],
   ],
 }