[yocto] [PATCH][yocto-autobuilder] autobuilder/Autobuilder.p: Add missing import of buildbot.util.

[Aníbal Limón]

When try to start Autobuilder fails with the next exception,

2016-06-07 17:06:45-0500 [-] LOADING CONFIG FILE
2016-06-07 17:06:45-0500 [-] error while parsing config file:

Traceback (most recent call last):
          File
"/home/alimon/repos/yocto-autobuilder/lib/python2.7/site-packages/Twisted-12.2.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py",
line 551, in _runCallbacks
......
......
......
          File
"/home/alimon/repos/yocto-autobuilder/lib/python2.7/site-packages/autobuilder/Autobuilder.py",
line 54, in createBuildsets
            util.naturalSort(buildersSorted)
        exceptions.NameError: global name 'util' is not defined

Signed-off-by: Aníbal Limón <anibal.limon at linux.intel.com>
---
 lib/python2.7/site-packages/autobuilder/Autobuilder.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/python2.7/site-packages/autobuilder/Autobuilder.py b/lib/python2.7/site-packages/autobuilder/Autobuilder.py
index 6c3e578..23f0a74 100644
--- a/lib/python2.7/site-packages/autobuilder/Autobuilder.py
+++ b/lib/python2.7/site-packages/autobuilder/Autobuilder.py
@@ -19,6 +19,7 @@ from buildbot.schedulers.basic  import SingleBranchScheduler
 from buildbot.changes import filter
 from buildbot.changes.pb import PBChangeSource
 from buildbot.changes.gitpoller import *
+from buildbot import util
 from lib.ABTools import capitalize
 import ast
 import BuildSet
-- 
2.1.4