Enable building dnssec-cds.exe

Enable building dnssec-cds.exe

Build configuration for the dnssec-cds Visual Studio project is absent
from the solution file template, which means the solution needs to be
upgraded using "devenv bind9.sln /upgrade" in order for the dnssec-cds
project to be built.  Add the build configuration for dnssec-cds to the
solution file template so that upgrading the solution is not necessary
for building that project.