This adds a simple `Jenkinsfile` that runs `make lint` and `make test`.
Had to also add a `deps` target that runs `lint-install` to install missing `golangci-lint`.
Jobs folder: https://ci.status.im/job/go-waku/
Resolves: https://github.com/status-im/go-waku/issues/11
Signed-off-by: Jakub Sokołowski <jakub@status.im>
