Add perl-Sort-Natually module to core update 68.

diff --git a/config/rootfiles/core/68/filelists/perl-Sort-Naturally b/config/rootfiles/core/68/filelists/perl-Sort-Naturally
new file mode 120000 (symlink)
index 0000000..9d70650
--- /dev/null
+++ b/config/rootfiles/core/68/filelists/perl-Sort-Naturally
@@ -0,0 +1 @@
+../../../common/perl-Sort-Naturally
\ No newline at end of file