dreport: Add time and date to the BMC dump

Execute the script and append the output log file to BMC dump.

[timedatectl]
               Local time: Thu 2022-03-24 10:28:17 UTC
           Universal time: Thu 2022-03-24 10:28:17 UTC
                 RTC time: Thu 2022-03-24 10:28:17
                Time zone: UTC (UTC, +0000)
System clock synchronized: no
              NTP service: active
          RTC in local TZ: no

Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
Change-Id: Ie1ac4e730d93d1959b2543de00b98c7513552560