Add getter for zrtp_secrets_file, static_picture and root_ca

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index 55a86251dd3dd6516f5ecef45a39371826f69c9a..07779d3e25a58b7d252338cd0c327f1f7d9d5e6b 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 55a86251dd3dd6516f5ecef45a39371826f69c9a
+Subproject commit 07779d3e25a58b7d252338cd0c327f1f7d9d5e6b