[gnome-boxes/gnome-3-30] Update git submodule (libovf-glib)

[Felipe Borges <felipeborges src gnome org>]

commit b89f9d214dcee48677626882a13bebff8cbb7003
Author: Felipe Borges <felipeborges gnome org>
Date:   Tue Sep 25 09:57:06 2018 +0200

    Update git submodule (libovf-glib)

 subprojects/libovf-glib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/subprojects/libovf-glib b/subprojects/libovf-glib
index 7282ec85..4bef85e9 160000
--- a/subprojects/libovf-glib
+++ b/subprojects/libovf-glib
@@ -1 +1 @@
-Subproject commit 7282ec85f6665be64e00bfc6ac2e9545df866b48
+Subproject commit 4bef85e97c636ac4747cb815cf12a0591271b218