Warn instead of error for generic Linux install
Warn instead of error for generic Linux install

This works in most cases. Let's not scare people.

dotless-de/vagrant-vbguest,wizonesolutions/vagrant-parallels-tools,giabao/vagrant-vbguest,dotless-de/vagrant-vbguest,roidelapluie/vagrant-vbguest,nishaya/vagrant-vbguest,LalatenduMohanty/vagrant-vbguest