snappy swap redux

[Dan Kegel]

Hi all,
the ol' oom killer is getting me down.
What's the kosher way of setting up swap in ubuntu core 16 (on raspberry pi)?
https://lists.ubuntu.com/archives/snappy-devel/2016-March/001632.html
mentions it should be done in a gadget.  Is there a gadget tutorial?
https://lists.snapcraft.io/archives/devices/2016-September/000005.html
mentions it a bit but seems stale.

In the meantime, I guess I can just do swapon manually.