core135: Ship forgotten ddns package

This was updated before, but I forgot to ship it in the updater.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/rootfiles/core/135/filelists/ddns b/config/rootfiles/core/135/filelists/ddns
new file mode 120000 (symlink)
index 0000000..7395164
--- /dev/null
+++ b/config/rootfiles/core/135/filelists/ddns
@@ -0,0 +1 @@
+../../../common/ddns
\ No newline at end of file