Bug#327423:

[Andres Mejia]

tags 327423 wontfix
thanks

The demos are not distributed primarily because of the content in its
Media directory being non-redistributable. It won't be for the
foreseeable future.

It was easier to just provide a script that downloads the upstream
source and compile the demos alone. This script is found under
/usr/share/doc/libogre-dev/examples/compileall.sh after installing
libogre-dev.