It took a bit more time to do this than I would have liked, but I'm happy to announce that I have some scripts that can be used to start a RoboRIO VM in QEMU on linux.
Now, you might ask, what is this useful for? Well.. probably not that much. However, anything that you're doing that depends on having an ARM userspace and doesn't rely on kernel/hardware features... this might be useful for you. Or not.
https://github.com/robotpy/roborio-vm
It's a bit rough right now, but seems to be functional. Try it out, let me know if you find it useful! If you find bugs, submit a pull request with your fixes.
PS: It sorta works with the 2015 image, but not particularly well. For best results, you'll need the 2016 image, which is currently only available to beta teams.