Always load permission lang files before core.permissions

Extensions that add their permissions in the core.permissions event might use the language service to resolve a language key ('lang' => $language->lang('KEY')), rather than specifying the key itself ('lang' => 'KEY'). The core.permissions event is triggered in the constructor of the acl.permissions service. Therefore, all permissions_ language files should be auto-included before the acl.permissions service is instantiated.