ceph-object-corpus: add some old v2 monmaps

Signed-off-by: Sage Weil <sage@inktank.com>

diff --git a/ceph-object-corpus b/ceph-object-corpus
index cddd50247fe2d578c1bd25d011594888865f70da..4d64c3751101141a34beadf74c3e9f013bce550c 160000 (submodule)
--- a/ceph-object-corpus
+++ b/ceph-object-corpus
@@ -1 +1 @@
-Subproject commit cddd50247fe2d578c1bd25d011594888865f70da
+Subproject commit 4d64c3751101141a34beadf74c3e9f013bce550c