Add FFDC cat /proc/uptime

In addition to running the uptime command, run "cat /proc/uptime" as part of
FFDC collection.  The uptime command only gives the uptime to the nearest
minute vs to the nearest 100th of a second.

Change-Id: Ib17152a1efe58dac12595fe5e33035cdaf714843
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/lib/openbmc_ffdc_list.py b/lib/openbmc_ffdc_list.py
index 55ab332..5c09e82 100755
--- a/lib/openbmc_ffdc_list.py
+++ b/lib/openbmc_ffdc_list.py
@@ -22,7 +22,7 @@
     'BMC DATA':
     {
         'BMC OS': 'uname -a',
-        'BMC Uptime': 'uptime',
+        'BMC Uptime': 'uptime;cat /proc/uptime',
         'BMC File System Disk Space Usage': 'df -hT',
         'BMC Date Time': 'date;/sbin/hwclock --show;/usr/bin/timedatectl'
     },