core104: Ship recently updated which

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

diff --git a/config/rootfiles/core/104/filelists/which b/config/rootfiles/core/104/filelists/which
new file mode 120000 (symlink)
index 0000000..9cfc884
--- /dev/null
+++ b/config/rootfiles/core/104/filelists/which
@@ -0,0 +1 @@
+../../../common/which
\ No newline at end of file