ceph-object-corpus: add 0.94.2-207-g88e7ee7 hammer objects

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

diff --git a/ceph-object-corpus b/ceph-object-corpus
index 20351c6bae6dd4802936a5a9fd76e41b8ce2bad0..ef8a3bd8f5d358bdb40a8d61abd25b24b033ed5b 160000 (submodule)
--- a/ceph-object-corpus
+++ b/ceph-object-corpus
@@ -1 +1 @@
-Subproject commit 20351c6bae6dd4802936a5a9fd76e41b8ce2bad0
+Subproject commit ef8a3bd8f5d358bdb40a8d61abd25b24b033ed5b