Bug#906031: xserver-xorg-core: Wrong path for GLX module with nvidia proprietary driver and xorg 1.20

[Daniele Scasciafratte]

With the latest xorg packages changes downgrade xorg-core package like
before doesn't fix anymore the issue.
So right now I have the De working but is not rendered, I see the bars and
I press buttons where I know they are but the menu are not rendered too.
Anyone a suggestion? I tried doing a symlink to the library to the actual
path but broken everything so I reverted everything.