Make usb mounting more robust when packages are updated (#278)
Make usb mounting more robust when packages are updated (#278)

Use a systemd drop-in so the MountFlags aren't overwritten when packages are updated
edwinsteele/biblebox-pi,edwinsteele/biblebox-pi,edwinsteele/biblebox-pi,edwinsteele/biblebox-pi,edwinsteele/biblebox-pi,edwinsteele/biblebox-pi