sconeserver: fix autobuild failures

Fix sconeserver autobuild failures such as the following.

  http://autobuild.buildroot.net/results/58e/58e4886a6ff41e49ac86cbf497bb509fd37f0d68/



The sconeserver version is bumped to a recent revision in which it is
possible to pass the paths to Magick++-config, mysql_config and xml2-config to
the configure script.

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