core113: Ship openvpn which has been missing in core112 updater

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

diff --git a/config/rootfiles/core/113/filelists/openvpn b/config/rootfiles/core/113/filelists/openvpn
new file mode 120000 (symlink)
index 0000000..493f3f7
--- /dev/null
+++ b/config/rootfiles/core/113/filelists/openvpn
@@ -0,0 +1 @@
+../../../common/openvpn
\ No newline at end of file