Enhance info about missing native libraries

[mickel8]

At this moment, if some native library is missing user will see in most cases info about missing .pc file which isn't too meaningful.

The task is to enhance info about missing native libraries so that user will see info similar to:

for Ubuntu:

You are missing ffmpeg in your OS.
To install it run `apt install ffmpeg`.

for MacOS:

You are missing ffmpeg in your OS.
To install it run `brew install ffmpeg`.

[mat-hek]

done in #105