meta-facebook: Revise rsyslog post rotation

rsyslog doesn't support reload, so the log rotation is not work.
Changed to do restart.

Tested: tested on yv4 system.

Change-Id: I6b77af4bcbf83ff2dd914a8766e9f21a6a0afbb3
Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@wiwynn.com>
diff --git a/meta-facebook/recipes-extended/rsyslog/rsyslog/rsyslog.logrotate b/meta-facebook/recipes-extended/rsyslog/rsyslog/rsyslog.logrotate
index 9eddafa..02f80a9 100644
--- a/meta-facebook/recipes-extended/rsyslog/rsyslog/rsyslog.logrotate
+++ b/meta-facebook/recipes-extended/rsyslog/rsyslog/rsyslog.logrotate
@@ -7,6 +7,6 @@
     size 64k
     missingok
     postrotate
-        systemctl reload rsyslog 2> /dev/null || true
+        systemctl restart rsyslog 2> /dev/null || true
     endscript
 }