Send ZRTP hello hash in SIP SDP.

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index 07824fcf3879d265c59beaf970d833b5859f3691..45c9c65168a9912bd2aa97344b396771ff1cdaf0 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 07824fcf3879d265c59beaf970d833b5859f3691
+Subproject commit 45c9c65168a9912bd2aa97344b396771ff1cdaf0