update ms2 for macosx build

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index 502db41537d8f39cacf7ba0b17fc2011db745fed..0d6911fac054d2a30e916e01b80cc9bc7220dbd5 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 502db41537d8f39cacf7ba0b17fc2011db745fed
+Subproject commit 0d6911fac054d2a30e916e01b80cc9bc7220dbd5