makedeb: Force Python setuptools to use Debian layout
makedeb: Force Python setuptools to use Debian layout

By default, setuptools on Debian installs to /usr/local/lib
instead of /usr/lib - see https://wiki.debian.org/Python/Packaging:

   Python interpreter in Debian (since Python 2.6) is modified to use
   /usr/lib/pythonX.Y/dist-packages instead of site-packages. This
   way we can avoid conflicts with manually installed interpreter. It
   will also use /usr/local as --prefix by default (everyone who
   had to uninstall something ez_install installed (and overwrote
   our files), knows how important this change is), you can pass
   --install-layout=deb to setup.py's install to set all the Debian's
   defaults (f.e. --prefix=/usr).

This change writes a setup.cfg file to the root of the source package,
overriding the default.

Signed-off-by: Euan Harris <c3b6e83069c8e9e3af49a38fec6026be89559638@citrix.com>

simonjbeaumont/planex,simonjbeaumont/planex,djs55/planex,simonjbeaumont/planex,djs55/planex,djs55/planex