Add hostname support for Kali linux 2.0
Add hostname support for Kali linux 2.0

This patch allows the hostname module to detect and set the hostname for a
Kali Linux 2.0 installation. Without this patch, the hostname module raises
the following error

   hostname module cannot be used on platform Linux (Kali)

Kali is based off of Debian.

thaim/ansible,thaim/ansible