virnetdev: Resolve Coverity RESOURCE_LEAK
virnetdev: Resolve Coverity RESOURCE_LEAK

virFileReadAll returns a chunk of memory that needs to be free'd when
done

agx/libvirt,libvirt/libvirt,datto/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,agx/libvirt,zippy2/libvirt,elmarco/libvirt,nertpinx/libvirt,elmarco/libvirt,olafhering/libvirt,olafhering/libvirt,shugaoye/libvirt,andreabolognani/libvirt,taget/libvirt,olafhering/libvirt,crobinso/libvirt,fabianfreyer/libvirt,rlaager/libvirt,jardasgit/libvirt,andreabolognani/libvirt,crobinso/libvirt,nertpinx/libvirt,taget/libvirt,shugaoye/libvirt,eskultety/libvirt,zippy2/libvirt,jfehlig/libvirt,elmarco/libvirt,eskultety/libvirt,elmarco/libvirt,VenkatDatta/libvirt,taget/libvirt,eskultety/libvirt,andreabolognani/libvirt,elmarco/libvirt,shugaoye/libvirt,crobinso/libvirt,rlaager/libvirt,jardasgit/libvirt,datto/libvirt,zippy2/libvirt,eskultety/libvirt,taget/libvirt,datto/libvirt,libvirt/libvirt,datto/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,shugaoye/libvirt,jfehlig/libvirt,jardasgit/libvirt,andreabolognani/libvirt,nertpinx/libvirt,rlaager/libvirt,fabianfreyer/libvirt,datto/libvirt,nertpinx/libvirt,andreabolognani/libvirt,rlaager/libvirt,libvirt/libvirt,taget/libvirt,agx/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,agx/libvirt,crobinso/libvirt,VenkatDatta/libvirt,agx/libvirt,jfehlig/libvirt,rlaager/libvirt,eskultety/libvirt,jfehlig/libvirt,zippy2/libvirt,olafhering/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,jardasgit/libvirt