[gnome-boxes] installer-media: Add a stub for prefers_ich9

[Felipe Borges <felipeborges src gnome org>]

commit cfe85fa73fa1224bccc5aca0a4f1f5dc6434c590
Author: Fabiano Fidêncio <fidencio redhat com>
Date:   Fri Oct 12 09:13:54 2018 +0200

    installer-media: Add a stub for prefers_ich9
    
    It's going to be really implemented in different parts of this series
    when we're actually switching the default machine type to q35.
    
    For now, the stub is just preparing the ground for coming changes.
    
    Related: https://bugzilla.redhat.com/show_bug.cgi?id=1581422
    
    Signed-off-by: Fabiano Fidêncio <fidencio redhat com>

 src/installer-media.vala | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/installer-media.vala b/src/installer-media.vala
index 0a83ba0b..7d95d651 100644
--- a/src/installer-media.vala
+++ b/src/installer-media.vala
@@ -55,6 +55,12 @@
         }
     }
 
+    public bool prefers_ich9 {
+        get {
+            return false;
+        }
+    }
+
     public virtual bool live { get { return os_media == null || os_media.live; } }
     public virtual bool eject_after_install { get { return os_media == null || os_media.eject_after_install; 
} }