Bug 1791138 - Scraping system symbols for Ubuntu is slow and needs more time r=gerard-majax

Differential Revision: https://phabricator.services.mozilla.com/D218835

taskcluster/kinds/system-symbols/kind.yml

@@ -260,7 +260,7 @@ tasks:
                   type: directory
                   path: /builds/worker/artifacts/
             docker-image: {in-tree: system-symbols-linux-scraper}
-            max-run-time: 14400
+            max-run-time: 18000
         run:
             using: run-task
             command: >-