tc-testing: list required kernel options for act_ct action

Updated config with required kernel options for conntrac TC action,
so that tdc can run the tests.
Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/tc-testing/config

+#
+# Core Netfilter Configuration
+#
+CONFIG_NF_CONNTRACK=m
+CONFIG_NF_CONNTRACK_MARK=y
+CONFIG_NF_CONNTRACK_ZONES=y
+CONFIG_NF_CONNTRACK_LABELS=y
+CONFIG_NF_NAT=m
+
 CONFIG_NET_SCHED=y
 
 #
@@ -42,6 +51,7 @@ CONFIG_NET_ACT_CTINFO=m
 CONFIG_NET_ACT_SKBMOD=m
 CONFIG_NET_ACT_IFE=m
 CONFIG_NET_ACT_TUNNEL_KEY=m
+CONFIG_NET_ACT_CT=m
 CONFIG_NET_ACT_MPLS=m
 CONFIG_NET_IFE_SKBMARK=m
 CONFIG_NET_IFE_SKBPRIO=m