[dak/master] Import errno, used in Exception handling.

[Paul Tagliamonte <tag@pault.ag>]

>From a reject exception:

|   File "/srv/ftp-master.debian.org/dak/dak/daklib/upload.py", line 155, in check
|     if e.errno == errno.ENOENT:
| NameError: global name 'errno' is not defined
---
 daklib/upload.py |    1 +
 1 file changed, 1 insertion(+)

diff --git a/daklib/upload.py b/daklib/upload.py
index 76939bd..7095b67 100644
--- a/daklib/upload.py
+++ b/daklib/upload.py
@@ -23,6 +23,7 @@ It provides methods to access the included binary and source packages.
 
 import apt_inst
 import apt_pkg
+import errno
 import os
 import re
 
-- 
1.7.10.4