Issue 5137 - [emscripten] Added basic filter storage implementation

test/filterStorage.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 273 matching lines @@
   changes = [];
   addFilter("foo");
   compareFiltersList(test, "Adding filter already in a disabled subscription", [["foo"], ["@@bar", "foo##bar", "foo#@#bar"], ["!foobar", "foo"]]);
   test.deepEqual(changes, ["filter.added foo 2 1"], "Received changes");
 
   changes = [];
   removeFilter("foo");
   compareFiltersList(test, "Removing filter", [[], ["@@bar", "foo##bar", "foo#@#bar"], ["!foobar"]]);
   test.deepEqual(changes, [
     "filter.removed foo 0 0",
-    "filter.removed foo 2 1",
+    "filter.removed foo 2 1"
   ], "Received changes");
 
   changes = [];
   removeFilter("foo");
   compareFiltersList(test, "Removing unknown filter", [[], ["@@bar", "foo##bar", "foo#@#bar"], ["!foobar"]]);
   test.deepEqual(changes, [], "Received changes");
 
   test.done();
 };