[chrony] don't log output of chrony-wait service

[Miroslav Lichvar]

commit 54afb2fcbc41140f53804a3dab56b65cae85e283
Author: Miroslav Lichvar <mlichvar at redhat.com>
Date:   Tue Sep 11 19:45:58 2012 +0200

    don't log output of chrony-wait service

 chrony-wait.service |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/chrony-wait.service b/chrony-wait.service
index 3958160..6513b4f 100644
--- a/chrony-wait.service
+++ b/chrony-wait.service
@@ -11,6 +11,7 @@ Type=oneshot
 # clock correction to be less than 0.1 seconds
 ExecStart=/usr/bin/chronyc waitsync 60 0.1
 RemainAfterExit=yes
+StandardOutput=null
 
 [Install]
 WantedBy=multi-user.target