add 2 new system addons
add 2 new system addons

via https://ftp.mozilla.org/pub/system-addons/disable-ocsp-stapling/
and the other just got added to Nightly with the flag: isSystem = true
kumar303/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,tsl143/addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend