Bump to mono/2017-04/161f0320 (#707)

Context: https://bugzilla.xamarin.com/show_bug.cgi?id=56111 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=56452 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=58114 "Semi-weekly" bump.
2017-07-30 08:48:36 -07:00 · 2017-07-30 08:48:36 -07:00 · 5af510d9cf
--- a/external/mono
+++ b/external/mono
@ -1 +1 @@
-Subproject commit 3d531ba62551abca0ca0d679ae0d4e8a31cf1b67
+Subproject commit 161f0320b5aa0a78e12ce716310d29dc704e438c