update ms2 and ortp

[linphone] / oRTP

diff --git a/oRTP b/oRTP
index 16db796543aa4cf0e44bb022f5556d7536e60c34..20b527144f9850dd9065d96db7a20244e8a8b227 160000 (submodule)
--- a/oRTP
+++ b/oRTP
@@ -1 +1 @@
-Subproject commit 16db796543aa4cf0e44bb022f5556d7536e60c34
+Subproject commit 20b527144f9850dd9065d96db7a20244e8a8b227