fix make distcheck

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index 2e01e66b741925629ac0926cd8bdcdb9aacfbfad..bad52c10896b59cebc2dd29255349137553d9b8c 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 2e01e66b741925629ac0926cd8bdcdb9aacfbfad
+Subproject commit bad52c10896b59cebc2dd29255349137553d9b8c