Bug Description

Add a new update-motd script for printing news and/or important notices.

== SRU ==

[IMPACT]

We should add important security messages or other news to the MOTD.

[TEST CASE]

Login to the system and ensure that the "news" section of the motd is displayed. Note that you might need to force trigger an update by running 'sudo update-motd'.

[REGRESSION POTENTIAL]

No reasonable regression potential. The script simply prints 2 lines of text to the MOTD.