Add test_update_config.sh helper script

Author: aabc

Diff for: test_update_config.sh

@@ -0,0 +1,38 @@
+#!/bin/bash -efu
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Update default .config for values required to run tests
+#
+
+set -x
+cp -f .config .config-pkt-netflow.bak
+
+if type virtme-configkernel >/dev/null 2>&1; then
+  virtme-configkernel --update
+fi
+
+scripts/config \
+  -e CONFIG_VETH \
+  -e CONFIG_PACKET \
+  -e CONFIG_NETFILTER \
+  -e CONFIG_NETFILTER_XTABLES \
+  -e NETFILTER_ADVANCED \
+  -e CONFIG_IP_NF_FILTER \
+  -e CONFIG_IP_NF_IPTABLES \
+  -e CONFIG_IP6_NF_FILTER \
+
+if [ "${1-}" = debug ]; then
+scripts/config \
+  -e CONFIG_LOCK_DEBUGGING_SUPPORT \
+  -e CONFIG_PROVE_LOCKING \
+  -e CONFIG_DEBUG_SPINLOCK \
+  -e CONFIG_FRAME_POINTER \
+  -d CONFIG_RANDOMIZE_BASE \
+
+fi
+
+make olddefconfig
+
+scripts/diffconfig .config-pkt-netflow.bak .config
+
+# export XTABLES_LIBDIR=