profiles: enable JSON support for nftables

This help for automation and scripting purposes. dev-libs/jansson is
already shipped in the generic image.

Signed-off-by: Mathieu Tortuyaux <[email protected]>

Author: tormath1

sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use

@@ -108,6 +108,7 @@ sys-libs/ldb -lmdb -python
 
 # Enable nftables backend for the iptables instead of legacy backend
 net-firewall/iptables nftables
+net-firewall/nftables json
 
 # Install `perl` with a minimal set of dependencies
 dev-lang/perl minimal