Bug 1259384 - request longer timeout in browser_privacypane_4.js mochitest. r=ehsan

MozReview-Commit-ID: 7RBqq0XUbaR

browser/components/preferences/in-content/tests/browser_privacypane_4.js

@@ -1,3 +1,5 @@
+requestLongerTimeout(2);
+
 let loader = Cc["@mozilla.org/moz/jssubscript-loader;1"].
              getService(Ci.mozIJSSubScriptLoader);
 let rootDir = getRootDirectory(gTestPath);