[gnome-builder] Add default application icon for appMenu

[Christian Hergert <chergert src gnome org>]

commit cb91dee72047df13e589bcf8bf8aa5e3adcabad8
Author: Alex285 <alexis diavatis hotmail com>
Date:   Mon Dec 21 15:16:45 2015 +0200

    Add default application icon for appMenu
    
    https://bugzilla.gnome.org/show_bug.cgi?id=759735

 libide/ide-application.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libide/ide-application.c b/libide/ide-application.c
index 29decf4..f3a4cba 100644
--- a/libide/ide-application.c
+++ b/libide/ide-application.c
@@ -411,6 +411,7 @@ ide_application_init (IdeApplication *self)
   textdomain (GETTEXT_PACKAGE);
 
   g_set_application_name (_("Builder"));
+  gtk_window_set_default_icon_name("builder");
 }
 
 IdeApplication *