Make some update to drone deployment

templates/drone/drone-PersistentVolumeClaim.yaml

@@ -0,0 +1,19 @@
+# Source: drone/templates/pvc.yaml
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  labels:
+    helm.sh/chart: drone-0.1.5
+    app.kubernetes.io/name: drone
+    app.kubernetes.io/instance: drone
+    app.kubernetes.io/component: server
+    app.kubernetes.io/version: "1.6.5"
+    app.kubernetes.io/managed-by: Helm
+  name: drone
+  namespace: drone
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: "8Gi"