put in the necessary hooks for video support in the console.

This is a NOP as far as the current code is concerned,
but there is already support in ./configure and the
Makefiles for the various libraries used by console_video.c
(not yet in the tree) so addition is trivial.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89533 65c4cc65-6c06-0410-ace0-fbb531ad65f3