ota_from_target_files: Update ASCII art

ps2: Reduce width
     Reduce updater-script spam that happens
        before any operation that takes time
        to complete

http://patorjk.com/software/taag/#p=display&v=0&c=echo&f=Def%20Leppard&t=VANIR%0A%0A

Change-Id: I768a2e57096831887a71b66a28d8e47dc90c90c1