Update ms2 submodule.

diff --git a/mediastreamer2 b/mediastreamer2
index d5811e376759433da3c19585b2d8d0329e1c06b2..2b00fd8850748f53404a109473f0243b591ae87b 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit d5811e376759433da3c19585b2d8d0329e1c06b2
+Subproject commit 2b00fd8850748f53404a109473f0243b591ae87b