File netdata-logrotate-su.patch of Package netdata

--- system/netdata.logrotate.in.orig	2017-01-23 20:49:04.000000000 +0100
+++ system/netdata.logrotate.in	2017-02-02 12:17:57.110168995 +0100
@@ -1,4 +1,5 @@
 @localstatedir_POST@/log/netdata/*.log {
+	su netdata netdata
 	daily
 	missingok
 	rotate 14