[test] Add missing resource for test on Android

This is for fixing:
https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Android%20Arm64%20-%20N5X/871

TBR=sbc@chromium.org
NOTRY=true

Bug: v8:8020
Change-Id: I48180f3e24fbabfbc673890252a1067ef63d82a2
Reviewed-on: https://chromium-review.googlesource.com/1235578Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56070}

test/mjsunit/d8/d8-worker-script.js

@@ -28,6 +28,8 @@
 // Verify that the Worker constrcutor by default treats its first argument
 // as the filename of a script load and run.
 
+// Resources: test/mjsunit/d8/d8-worker-script.txt
+
 if (this.Worker) {
   var w = new Worker('test/mjsunit/d8/d8-worker-script.txt');
   assertEquals("Starting worker", w.getMessage());