Provide the minimal applications and plugins for: cgi, filelog, syslog and
python3. More plugins can be added if needed by other packages. Autostart
uwsgi in emperor mode loading vassals on demand.

For now, include luci-support (maybe it will be moved to another package),
which uses the syslog plugin by default.

Signed-off-by: Peter Stadler <peter.stadler@student.uibk.ac.at>

On a Debian system without python3-distutils install, uwsgi-cgi was
failing to build because it couldn't import sysconfig from distutils.
OpenWrt packages should be using the OpenWrt python not the system
python. In addition we need to use python3 not python2, even when
both are available.

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>