[gnome-continuous/wip/new-model] Two fixes for autobuilder

[Colin Walters <walters src gnome org>]

commit 79a558f7d28f6e6f80b1b09a3877658822364af2
Author: Colin Walters <walters verbum org>
Date:   Tue Oct 8 07:37:36 2013 -0400

    Two fixes for autobuilder

 src/js/builtins/autobuilder.js |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/js/builtins/autobuilder.js b/src/js/builtins/autobuilder.js
index 0226e41..c89ca6b 100644
--- a/src/js/builtins/autobuilder.js
+++ b/src/js/builtins/autobuilder.js
@@ -23,6 +23,7 @@ const GSystem = imports.gi.GSystem;
 
 const Builtin = imports.builtin;
 const Task = imports.task;
+const BuildUtil = imports.buildutil;
 const ProcUtil = imports.procutil;
 const VersionedDir = imports.versioneddir;
 
@@ -178,7 +179,7 @@ const Autobuilder = new Lang.Class({
 
         if (lastVersion) {
             let lastBuildPath = this._buildsDir.path.get_child(lastVersion);
-            BuildUtil.atomicSymlinkSwap(buildPath.get_child('last-build'), lastBuildPath);
+            BuildUtil.atomicSymlinkSwap(buildPath.get_child('last-build'), lastBuildPath, null);
         }
 
         return buildPath;