Log Message:
wayland: Update to 1.21.0. This allows wayland to work on NetBSD again
with the latest gtk3. However, I have decided to drop the custom kqueue
patches and use libepoll-shim now that it seems relatively stable.

We can take advantage of the relatively useful OS abstractions in the
latest version of the source tree. Thanks for throwing a twig, upstream!
Shame about the input API.