add video build for ios

[linphone] / mediastreamer2

diff --git a/mediastreamer2 b/mediastreamer2
index 285b4e9c790f34a4cc1087af72425290c532c1df..1706dc1feb44ee5180a488b6a24a1eab48d6d060 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 285b4e9c790f34a4cc1087af72425290c532c1df
+Subproject commit 1706dc1feb44ee5180a488b6a24a1eab48d6d060