GN: Fix resource files for iOS test target

webrtc/modules/audio_coding/BUILD.gn

Index: webrtc/modules/audio_coding/BUILD.gn
diff --git a/webrtc/modules/audio_coding/BUILD.gn b/webrtc/modules/audio_coding/BUILD.gn
index 72a471d9a6ae496e67f15f776f22715ee1396fe8..27c1060e44d5dd09152ef73a9acb96b06ff555f8 100644
--- a/webrtc/modules/audio_coding/BUILD.gn
+++ b/webrtc/modules/audio_coding/BUILD.gn
@@ -981,6 +981,21 @@ if (rtc_include_tests) {
     ]
   }  # insert_packet_with_timing
 
+  if (is_android || is_ios) {
+    audio_decoder_unittests_resources =
+        [ "//resources/audio_coding/testfile32kHz.pcm" ]
+  }
+
+  if (is_ios) {
+    bundle_data("audio_decoder_unittests_bundle_data") {
+      testonly = true
+      sources = audio_decoder_unittests_resources
+      outputs = [
+        "{{bundle_resources_dir}}/{{source_file_part}}",
+      ]
+    }
+  }
+
   test("audio_decoder_unittests") {
     testonly = true
     sources = [
@@ -1013,13 +1028,11 @@ if (rtc_include_tests) {
 
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_native_code" ]
+      data = audio_decoder_unittests_resources
       shard_timeout = 900
     }
-
-    if (is_android || is_ios) {
-      data = [
-        "//resources/audio_coding/testfile32kHz.pcm",
-      ]
+    if (is_ios) {
+      deps += [ ":audio_decoder_unittests_bundle_data" ]
     }
   }  # audio_decoder_unittests