Make rtc_software_fallback_wrappers target visible.

Need to depend on them from Chromium.

Bug: webrtc:7925
Change-Id: Iea1bb3b937c602920bfd87f885c87c790ac7bc17
Reviewed-on: https://webrtc-review.googlesource.com/82061
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23580}
diff --git a/BUILD.gn b/BUILD.gn
index 04e97a2..e997937 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -435,7 +435,7 @@
       "api:rtc_api_unittests",
       "api/audio/test:audio_api_unittests",
       "api/audio_codecs/test:audio_codecs_api_unittests",
-      "api/video_codecs/test:builtin_video_codec_factory_unittests",
+      "api/video_codecs/test:video_codecs_api_unittests",
       "p2p:libstunprober_unittests",
       "p2p:rtc_p2p_unittests",
       "rtc_base:rtc_base_approved_unittests",