Core Update 172: Ship conntrack-tools

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>

diff --git a/config/rootfiles/core/172/filelists/conntrack-tools b/config/rootfiles/core/172/filelists/conntrack-tools
new file mode 120000 (symlink)
index 0000000..88fbe06
--- /dev/null
+++ b/config/rootfiles/core/172/filelists/conntrack-tools
@@ -0,0 +1 @@
+../../../common/conntrack-tools
\ No newline at end of file