core156: Ship liboping

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

diff --git a/config/rootfiles/core/156/filelists/liboping b/config/rootfiles/core/156/filelists/liboping
new file mode 120000 (symlink)
index 0000000..3ae1904
--- /dev/null
+++ b/config/rootfiles/core/156/filelists/liboping
@@ -0,0 +1 @@
+../../../common/liboping
\ No newline at end of file