phosh/squeekboard: new aport & phosh/virtboard: update to latest commit

Squeekboard is going to replace virtboard in Phosh. However, it requires Rust which hasn't yet been packaged on Alpine Linux for aarch64. So for now, keep virtboard as the default (it still works fine) and update it to the latest commit, but also introduce squeekboard so we can test it and eventually enabled it for aarch64 and replace virtboard.