Update ms2 for VP8 fixes.

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index b40cd2308ed594e2f4f311654a4291b22c72b5ac..60edaade52a6f123f2cde6140ca90378d95c9d87 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit b40cd2308ed594e2f4f311654a4291b22c72b5ac
+Subproject commit 60edaade52a6f123f2cde6140ca90378d95c9d87