update ms2 and oRTP to enable makefile dependency generation on MACOSX

[linphone] / oRTP

diff --git a/oRTP b/oRTP
index de8ecee12b217f5e63e12fdfe1e3462e248ad46d..ec28d996924a48d8bf2471cff10bb331533a183e 160000 (submodule)
--- a/oRTP
+++ b/oRTP
@@ -1 +1 @@
-Subproject commit de8ecee12b217f5e63e12fdfe1e3462e248ad46d
+Subproject commit ec28d996924a48d8bf2471cff10bb331533a183e