Use sys.path.append to ensure proper environment

Signed-off-by: NLuca Falavigna <dktrkranz@debian.org>

tools/import_changelogs.py

@@ -6,6 +6,7 @@ import os
 import sys
 import fnmatch
 from glob import glob
+sys.path.append('../dak')
 from daklib.dbconn import *
 from daklib import utils
 from daklib.queue import Upload