Update submodule to frr-6.0.1

Signed-off-by: Rhonda D'Vine <rhonda@proxmox.com>

diff --git a/frr b/frr
index c8c24278b1d1da271089a36303bb7708568ce231..5120b706e713d695a411c21c41fd3ff05f7f66aa 160000 (submodule)
--- a/frr
+++ b/frr
@@ -1 +1 @@
-Subproject commit c8c24278b1d1da271089a36303bb7708568ce231
+Subproject commit 5120b706e713d695a411c21c41fd3ff05f7f66aa