Update oRTP submodule.

[linphone] / oRTP

diff --git a/oRTP b/oRTP
index 8cf1bea6dfa66332cad995fc1c9f38b0b98d77c0..2d8a82247fbebbd690ae2fc8300522ab9b71a542 160000 (submodule)
--- a/oRTP
+++ b/oRTP
@@ -1 +1 @@
-Subproject commit 8cf1bea6dfa66332cad995fc1c9f38b0b98d77c0
+Subproject commit 2d8a82247fbebbd690ae2fc8300522ab9b71a542