update ms2 and ortp

[linphone] / oRTP

diff --git a/oRTP b/oRTP
index ddc4f7d041967305483761fc9c643d3bb290a5f1..88ace8adfecde4d03ea9030d625f6949f4f5fab4 160000 (submodule)
--- a/oRTP
+++ b/oRTP
@@ -1 +1 @@
-Subproject commit ddc4f7d041967305483761fc9c643d3bb290a5f1
+Subproject commit 88ace8adfecde4d03ea9030d625f6949f4f5fab4