Make it possible to isolate isac_fix_test.

Successful swarming run:
https://chromium-swarm.appspot.com/task?id=38769e8dd5d3e110&refresh=10&show_raw=1

BUG=chromium:755660
NOTRY=True

Review-Url: https://codereview.webrtc.org/3009203002
Cr-Original-Commit-Position: refs/heads/master@{#19738}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 25586cefddcc4b38a5260ef1c6b8cc72b9c1893e
diff --git a/modules/audio_coding/BUILD.gn b/modules/audio_coding/BUILD.gn
index 4003db1..32d5336 100644
--- a/modules/audio_coding/BUILD.gn
+++ b/modules/audio_coding/BUILD.gn
@@ -1925,6 +1925,10 @@
       "../../test:test_support",
     ]
 
+    data = [
+      "../../../resources/speech_and_misc_wb.pcm",
+    ]
+
     if (is_win) {
       cflags = [
         # Disable warnings to enable Win64 build, issue 1323.