Add missing dependency to audio_decoder_unittests.

webrtc/modules/audio_coding/BUILD.gn

 # Copyright (c) 2014 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.
 
 import("../../webrtc.gni")
 import("audio_coding.gni")
@@ skipping 1307 matching lines @@
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
 
     deps = []
 
     defines = neteq_defines
 
     deps += audio_coding_deps
     deps += [
       ":audio_decoder_interface",
+      ":ilbc",
       ":isac",
       ":isac_fix",
       ":neteq",
       ":neteq_unittest_tools",
       "../../common_audio",
       "../../test:test_main",
       "//testing/gtest",
     ]
 
     data = audio_decoder_unittests_resources
@@ skipping 769 matching lines @@
         ":neteq_unittest_proto",
       ]
     }
 
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }