message: [build] do not complain about debian when DNS64 is not enabled
  When building on Debian with NAT64=1 and DNS64=0, the setup script
  will complain "dns64 is not tested on debian"
  Since DNS64 is not necessary for NAT64, the script should continue in
  this case instead of die.
diff: @@ -38,7 +38,7 @@ DNS64_CONF="dns64 $(echo $NAT64_PREFIX | tr \"/\" \"/\") { clients { thread; };
  # Currently solution was verified only on raspbian and ubuntu.
  #
  -without NAT64 || test "$PLATFORM" = ubuntu || test "$PLATFORM" = beagleboneblack || test "$PLATFORM" = raspbian || die "dns64 is not tested under $PLATFORM."
  +without NAT64 || without DNS64 || test "$PLATFORM" = ubuntu || test "$PLATFORM" = beagleboneblack || test "$PLATFORM" = raspbian || die "dns64 is not tested under $PLATFORM."
  if [ "$PLATFORM" = raspbian ]; then
  RESOLV_CONF_HEAD=/etc/resolv.conf.head
  