update PSPs to allow projected volumes

cluster/addons/fluentd-gcp/podsecuritypolicies/event-exporter-psp.yaml

@@ -19,6 +19,7 @@ spec:
   volumes:
   - 'hostPath'
   - 'secret'
+  - 'projected'
   # TODO: This only needs a hostPath to read /etc/ssl/certs,
   #   but it should be able to just include these in the image.
   allowedHostPaths:

cluster/addons/fluentd-gcp/podsecuritypolicies/fluentd-gcp-psp.yaml

@@ -20,6 +20,7 @@ spec:
   - 'configMap'
   - 'hostPath'
   - 'secret'
+  - 'projected'
   allowedHostPaths:
     - pathPrefix: /var/log
     - pathPrefix: /var/lib/docker/containers