[arch-dev-public] Delaying the boost-1.66 rebuild

Hi, Kea [1] fails to build with boost 1.66.0, so please keep the rebuild in staging for a few more days. It does not seem like a big issue, but I won't be able to look into it before January. Thanks, Baptiste [1] https://www.archlinux.org/packages/community/x86_64/kea/