Bug 1547842 - use requestLongerTimeout(2) for browser_parsable_script.js to deal with failure on windows10-aarch64 r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D29296

--HG--
extra : moz-landing-system : lando

browser/base/content/test/static/browser_parsable_script.js

@@ -5,6 +5,9 @@
  * detect newly occurring issues in shipping JS. It is a list of regexes
  * matching files which have errors:
  */
+
+requestLongerTimeout(2);
+
 const kWhitelist = new Set([
   /browser\/content\/browser\/places\/controller.js$/,
 ]);