[gegl] antialias: use a custom example, that thresholds input first

[Øyvind Kolås <ok src gnome org>]

commit 302aa1eacc341deeddcaa4063dee296cfbaed912
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue May 2 23:12:47 2017 +0200

    antialias: use a custom example, that thresholds input first

 operations/common/antialias.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/operations/common/antialias.c b/operations/common/antialias.c
index d46d61f..7925324 100644
--- a/operations/common/antialias.c
+++ b/operations/common/antialias.c
@@ -278,8 +278,9 @@ gegl_op_class_init (GeglOpClass *klass)
     "title",       _("Scale3X Antialiasing"),
     "categories",  "enhance",
     "license",     "GPL3+",
-    "reference-hash", "51a4e204e61decfe6803cac37222c0ea",
+    "reference-hash", "265d02a3b3cd11bd7b612feca3706fec",
     "description", _("Antialias using the Scale3X edge-extrapolation algorithm"),
+    "reference-chain",    "load path=images/standard-input.png threshold antialias",
     NULL);
 }