Add support for Wayland in CI / CD

[Flux159]

Currently waiting on Google supporting wayland in Dawn builds. See #10 for additional discussion. @yegorius

[matthiasfostel]

The way this repo packages the Dawn may be helpful. It builds the Wayland+X11 option and then links the Bazel to Google's builds for the other platforms for less work.

https://github.com/kitten3d/dawn-builds