Add FFDC cat /proc/uptime
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 <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation