[PATCH] disk zone example needs write_bw_log

Less confusing now, since you can just run the job file. Before you
needed to know that -w was needed for the job to be meaningful.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/examples/disk-zone-profile b/examples/disk-zone-profile
index d95d9ea..96e5669 100644
--- a/examples/disk-zone-profile
+++ b/examples/disk-zone-profile
@@ -9,5 +9,6 @@
 iodepth=2
 zonesize=256m
 zoneskip=2g
+write_bw_log
 
 [/dev/sdb]