storage: Add missing pool type flags in comment

Signed-off-by: NHan Han <hhan@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/libvirt-storage.c

@@ -93,6 +93,9 @@ virStoragePoolGetConnect(virStoragePoolPtr pool)
  * VIR_CONNECT_LIST_STORAGE_POOLS_MPATH
  * VIR_CONNECT_LIST_STORAGE_POOLS_RBD
  * VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG
+ * VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER
+ * VIR_CONNECT_LIST_STORAGE_POOLS_ZFS
+ * VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE
  *
  * Returns the number of storage pools found or -1 and sets @pools to
  * NULL in case of error.  On success, the array stored into @pools is