Update submodule for serialization_lib

Signed-off-by: Won Jeon <won.jeon@arm.com>
Change-Id: I9504fa05b93417182a76aa74743f779db3036594
diff --git a/thirdparty/serialization_lib b/thirdparty/serialization_lib
index 5f92021..39b5edc 160000
--- a/thirdparty/serialization_lib
+++ b/thirdparty/serialization_lib
@@ -1 +1 @@
-Subproject commit 5f920211ac23393a7b98a0d358bfbfc3232d5c8f
+Subproject commit 39b5edc49734e08ca6d1c0b091416a04b2f60beb