scripts: add distro version check in setup.sh

Check the distro that a user is using before
proceeding to 'apt-get install'.

Signed-off-by: Yefeng Lin <yefeng.lin@arm.com>
Reviewed-by: Liangxing Wang <liangxing.wang@arm.com>
Reviewed-by: Nathan Brown <nathan.brown@arm.com>

Change-Id: I043428a331e9a78299de5b2a0bf984041582c958