pdns-builder: update builder

diff --git a/builder b/builder
index 5181becf38d564399e6ffaa8d041b123d8418f8c..124bbe72e4434a60dd764ad9c1d38f380d7a37b7 160000 (submodule)
--- a/builder
+++ b/builder
@@ -1 +1 @@
-Subproject commit 5181becf38d564399e6ffaa8d041b123d8418f8c
+Subproject commit 124bbe72e4434a60dd764ad9c1d38f380d7a37b7