Attendees are on their own for lunch. Lunch on both days is from 12 to 1:30pm, plenty of time to get out of the convention center and enjoy original Austin cuisine. If you wish to stay inside, the Convention Center will offer a grab and go stand near the registration desk and there are tables in the Attendee Lounge.
Here is a Google Map view of restaurants near the Austin Convention Center. Also, check out this article: 17 Terrific Lunch Options in Downtown Austin.
When you’re looking at these maps, keep in mind the Convention Center is at the corner of 4th Street and Trinity.