Fix alioth.debian URLs that are broken

Inspired by a patch from Martin Bark <martin@barkynet.com>, this fixes
autobuild issues related to packages not downloading from alioth.debian
URLs. This patches is meant to be "temporary" until the URLs are fixed
by debian.

Fixes:
  http://autobuild.buildroot.org/results/8c3/8c34649a7f98f60f14cff8b32fa2f8e82b1afeb6
  http://autobuild.buildroot.org/results/7e3/7e34e73e40fdb0e04bd63fa889f9bc14f7e30536



Signed-off-by: Ryan Barnett <rjbarnet@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>