Merge branch 'gromit-access-buildserver' into 'master'

Give gromit access to the build server

See merge request !788

group_vars/all/root_access.yml

@@ -28,6 +28,7 @@ root_ssh_keys:
       - wiki.archlinux.org
       - man.archlinux.org
       - gitlab.archlinux.org
+      - build.archlinux.org
 
 # run 'playbooks/tasks/reencrypt-vault-{super,default}-key.yml' when this
 # changes; before doing so, make sure to 'gpg --lsign-key' all keys from both