core139: add cpio to updater

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

diff --git a/config/rootfiles/core/139/filelists/cpio b/config/rootfiles/core/139/filelists/cpio
new file mode 120000 (symlink)
index 0000000..fbab21a
--- /dev/null
+++ b/config/rootfiles/core/139/filelists/cpio
@@ -0,0 +1 @@
+../../../common/cpio
\ No newline at end of file