Add syscall sandboxing (seccomp-bpf)

test/functional/test_runner.py

@@ -170,6 +170,7 @@ BASE_SCRIPTS = [
     'rpc_users.py',
     'rpc_whitelist.py',
     'feature_proxy.py',
+    'feature_syscall_sandbox.py',
     'rpc_signrawtransaction.py --legacy-wallet',
     'rpc_signrawtransaction.py --descriptors',
     'rpc_rawtransaction.py --legacy-wallet',