test: fix 015-ipv6 test to skip when IPv6 is disabled

diff --git a/test/simulation/015-ipv6 b/test/simulation/015-ipv6
index bca008d859bb6ecdbde1ae255c39696f01a55ee9..3e220cec4a7fcdba24c9743334074cd81156397d 100755 (executable)
--- a/test/simulation/015-ipv6
+++ b/test/simulation/015-ipv6
@@ -4,6 +4,8 @@
 
 test_start "IPv6 addressing"
 
+check_config_h 'FEAT_IPV6 1' || test_skip
+
 ip_family=6
 
 run_test || test_fail