check_dep.sh: Adding packages missing in an Ubuntu live server image

This patch adds the packages to the check list that are found
missing while using an Ubuntu 20.04 live-server image in the host
system.

Signed-off-by: Himanshu Sharma <Himanshu.Sharma@arm.com>
Change-Id: I2db24b502be37d3b9c5057f1a97451f2b43d2a85