Backed out changes.

Ignore deprecated warning.
Leave compatibility with 1.6x

[SVN r50547]

libs/serialization

@@ -1 +1 @@
-Subproject commit 90d9c0a064a13fbf057aab302f651be406d8d974
+Subproject commit aaa702db8f8cf833bdda5db22fd80d1259e23c60