meta-facebook: Config larger log size for obmc-console

The default log size is set as 16k and it is too small for yosemite4.
Increase log size to 256k.

Tested: Check if the log rotated at 256k - pass
```
root@bmc:~# ls -l /var/log/
-rw-rw-r--    1 root     utmp           292 Jan 24 23:41 lastlog
-rw-r--r--    1 root     root             0 Jan 24 23:39 obmc-console-host1.log
-rw-r--r--    1 root     root             0 Jan 24 23:39 obmc-console-host2.log
-rw-r--r--    1 root     root             0 Jan 24 23:39 obmc-console-host3.log
-rw-r--r--    1 root     root             0 Jan 24 23:39 obmc-console-host4.log
-rw-r--r--    1 root     root        163851 Jan 25 00:08 obmc-console-host5.log
-rw-r--r--    1 root     root        262144 Jan 25 00:06 obmc-console-host5.log.1
-rw-r--r--    1 root     root             0 Jan 24 23:39 obmc-console-host6.log
-rw-r--r--    1 root     root             0 Jan 24 23:39 obmc-console-host7.log
-rw-r--r--    1 root     root             0 Jan 24 23:39 obmc-console8.log
drwx------    2 root     root            40 Dec 15 07:36 private
-rw-r--r--    1 root     root        151253 Jan 25 00:08 redfish
-rw-r--r--    1 root     root           122 Jan 25 00:08 state
-rw-rw-r--    1 root     utmp          1152 Jan 24 23:41 wtmp
```

Change-Id: Id765ae87e84fd86539b835ca500ca2e8d6f8fb01
Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@wiwynn.com>
diff --git a/meta-facebook/recipes-phosphor/console/obmc-console/fb-compute-multihost/server.ttyS8.conf b/meta-facebook/recipes-phosphor/console/obmc-console/fb-compute-multihost/server.ttyS8.conf
index c10d2c2..ab83bd6 100644
--- a/meta-facebook/recipes-phosphor/console/obmc-console/fb-compute-multihost/server.ttyS8.conf
+++ b/meta-facebook/recipes-phosphor/console/obmc-console/fb-compute-multihost/server.ttyS8.conf
@@ -2,3 +2,4 @@
 baud = 57600
 console-id = host8
 logfile = /var/log/obmc-console8.log
+logsize = 256k