Fix low_bandwidth_audio_perf_test binary dependency on Windows

The split in https://webrtc-review.googlesource.com/c/src/+/62660
broke it.

No-Try: True
Bug: chromium:755660
Change-Id: I664f022cac9f8e7e0bb64a7cb59992f030543aa6
Reviewed-on: https://webrtc-review.googlesource.com/62801
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22486}
diff --git a/audio/BUILD.gn b/audio/BUILD.gn
index 83d5b1b..2d77135 100644
--- a/audio/BUILD.gn
+++ b/audio/BUILD.gn
@@ -207,10 +207,15 @@
 
       data = [
         "test/low_bandwidth_audio_test.py",
-        "${root_out_dir}/low_bandwidth_audio_test",
         "../resources/voice_engine/audio_tiny16.wav",
         "../resources/voice_engine/audio_tiny48.wav",
       ]
+      if (is_win) {
+        data += [ "${root_out_dir}/low_bandwidth_audio_test.exe" ]
+      } else {
+        data += [ "${root_out_dir}/low_bandwidth_audio_test" ]
+      }
+
       if (is_linux || is_android) {
         data += [
           "../tools_webrtc/audio_quality/linux/PolqaOem64",