Refactoring ./webrtc/modules/BUILD.gn for gn check

.gn

Index: .gn
diff --git a/.gn b/.gn
index ca3a6a751739e5a829c68856ca247c1eb1ed1280..278d6cccdd04790027bbce3997aaed9fdd3a4e91 100644
--- a/.gn
+++ b/.gn
@@ -24,22 +24,7 @@ secondary_source = "//build/secondary/"
 check_targets = [
   "//webrtc/api/*",
   "//webrtc/audio/*",
-  "//webrtc/modules/audio_coding/*",
-  "//webrtc/modules/audio_conference_mixer/*",
-  "//webrtc/modules/audio_device/*",
-  "//webrtc/modules/audio_mixer/*",
-  "//webrtc/modules/audio_processing/*",
-  "//webrtc/modules/bitrate_controller/*",
-  "//webrtc/modules/congestion_controller/*",
-  "//webrtc/modules/desktop_capture/*",
-  "//webrtc/modules/media_file/*",
-  "//webrtc/modules/pacing/*",
-  "//webrtc/modules/rtp_rtcp/*",
-  "//webrtc/modules/utility/*",
-  "//webrtc/modules/video_capture/*",
-  "//webrtc/modules/video_coding/*",
-  "//webrtc/modules/video_processing/*",
-  "//webrtc/modules/remote_bitrate_estimator/*",
+  "//webrtc/modules/*",
   "//webrtc/stats:rtc_stats",
   "//webrtc/voice_engine",
   "//webrtc/voice_engine:level_indicator",