Add directory listing of /tmp to the collection

[Jil]

In the edge case where you don't want to full filesystem timeline because of i/o restrictions, one would still need a peek into the content of /tmp.

As it's an edge case, there's no need to add it to the logstash configuration.

[56616c6f72]

working with Jil to resolve this.

[56616c6f72]

Added this in.