Updated to ffmpeg 4.0 on tutorials OpenMeetings 4.0.4 on Ubuntu 14.04 and 16.04

[Alvaro]

Hello,

Is updated the script for compilation of ffmpeg
to 4.0 in the tutorials called:

Installation OpenMeetings 4.0.4 on Ubuntu 14.04 LTS
Installation OpenMeetings 4.0.4 on Ubuntu 16.04 LTS

Can find it in:

https://cwiki.apache.org/confluence/display/OPENMEETINGS/Tutorials+for+
installing+OpenMeetings+and+Tools

Best regards

Alvaro