Core Update 172: Ship libxcrypt

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>

diff --git a/config/rootfiles/core/172/filelists/libxcrypt b/config/rootfiles/core/172/filelists/libxcrypt
new file mode 120000 (symlink)
index 0000000..ad93616
--- /dev/null
+++ b/config/rootfiles/core/172/filelists/libxcrypt
@@ -0,0 +1 @@
+../../../common/libxcrypt
\ No newline at end of file