Initial logstash package build in spksrc

Logstash Package created in spksrc for the SynoCommunity.
Nevermind... had one last idea that worked.

```
{
    ".url": {
        "com.synocommunity.packages.logstash": {
            "title": "logstash",
            "desc": "logstash Kibana Web UI",
            "icon": "images/logstash-{0}.png",
            "type": "url",
            "protocol": "http",
            "port": "5000",
            "url": "/webman/3rdparty/logstash/kibana/",
            "allUsers": false
        }
    }
}
```