libvlc.sym: Add missing libvlc_media_player_add_slave entry
libvlc.sym: Add missing libvlc_media_player_add_slave entry

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc