chore(contrib): bump coreos to v349.0.0

```
core@deis-1 ~ $ docker version
Client version: 1.0.0
Client API version: 1.12
Go version (client): go1.2
Git commit (client): 63fe64c
Server version: 1.0.0
Server API version: 1.12
Go version (server): go1.2
Git commit (server): 63fe64c
core@deis-1 ~ $ fleetctl --version
fleetctl version 0.4.0
core@deis-1 ~ $ etcdctl --version
etcdctl version 0.4.3
```
If this will automagically bump us to v1.1 when we rebuild the builder, then I'm more than happy about that, however we may run into a collision issue where CoreOS' docker version is at v1.0.0 and the builder is at v1.0.1. Is that something we want?