core157: Ship libupnp

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

diff --git a/config/rootfiles/core/157/filelists/libupnp b/config/rootfiles/core/157/filelists/libupnp
new file mode 120000 (symlink)
index 0000000..7ec2b00
--- /dev/null
+++ b/config/rootfiles/core/157/filelists/libupnp
@@ -0,0 +1 @@
+../../../common/libupnp
\ No newline at end of file