Update serialization_lib commit to include magic number

Signed-off-by: Frederick Liardet <frederick.liardet@arm.com>
Change-Id: I77e25d3f3293552b6c0ab2a112496507a820915f
diff --git a/third_party/serialization_lib b/third_party/serialization_lib
index 545a508..62c1e95 160000
--- a/third_party/serialization_lib
+++ b/third_party/serialization_lib
@@ -1 +1 @@
-Subproject commit 545a508429afe1d22760563d252839e13ecd12a3
+Subproject commit 62c1e95dc2f438e027f94e1dd2f486631489b189