Copyright for prctl source package in Xenial

This package was debianized by Khalid Aziz  and 
Bdale Garbee  in December of 2001 and is maintained
by Khalid Aziz .

Upstream Author: Khalid Aziz 

Copyright:

This software is copyright (c) 2001 by Khalid Aziz and Hewlett Packard
Company.

You are free to distribute this software under the terms of the GNU 
General Public License v2. 

On Debian systems, the complete text of the GNU General Public License 
can be found in /usr/share/common-licenses/GPL.