sconeserver: fix autouild failure

Fixes autobuild failures such as the following.

  http://autobuild.buildroot.net/results/1bdb5e014daf76b701afea5c82ac83ac4c97d4cb/



Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>