Remove the garbage log file in the fluentd-gcp that gets filled with

gunk when installing the google-fluentd agent.

Also let it log things by not redirecting to a file within the container
and only using -q (warning logs only) rather than -qq (error logs only).

docs/getting-started-guides/logging.md

@@ -169,14 +169,14 @@ metadata:
 spec:
   containers:
   - name: fluentd-cloud-logging
-    image: gcr.io/google_containers/fluentd-gcp:1.11
+    image: gcr.io/google_containers/fluentd-gcp:1.12
     resources:
       limits:
         cpu: 100m
         memory: 200Mi
     env:
     - name: FLUENTD_ARGS
-      value: -qq
+      value: -q
     volumeMounts:
     - name: varlog
       mountPath: /varlog