c167: Ship vnstat

vnstat is linked against libgd which has had an SO bump and therefore
needs to be shipped again.

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

diff --git a/config/rootfiles/core/167/filelists/vnstat b/config/rootfiles/core/167/filelists/vnstat
new file mode 120000 (symlink)
index 0000000..2e2e610
--- /dev/null
+++ b/config/rootfiles/core/167/filelists/vnstat
@@ -0,0 +1 @@
+../../../common/vnstat
\ No newline at end of file