GN: Change rtc_source_set targets --> rtc_static_library

webrtc/modules/audio_device/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("../../build/webrtc.gni")
 
@@ skipping 30 matching lines @@
       "-Wno-tautological-compare",
 
       # See https://bugs.chromium.org/p/webrtc/issues/detail?id=6265
       # for -Wno-thread-safety-analysis
       "-Wno-thread-safety-analysis",
       "-Wno-unused-private-field",
     ]
   }
 }
 
-rtc_source_set("audio_device") {
+rtc_static_library("audio_device") {
   public_configs = [ ":audio_device_config" ]
 
   deps = [
     "../..:webrtc_common",
     "../../base:rtc_base_approved",
     "../../base:rtc_task_queue",
     "../../common_audio",
     "../../system_wrappers",
     "../utility",
   ]
@@ skipping 195 matching lines @@
       "../../system_wrappers",
       "../../test:test_support",
       "../../test:test_support_main",
       "../rtp_rtcp",
       "../utility",
       "//testing/gtest",
     ]
     public_configs = [ ":audio_device_config" ]
   }
 }