Fix startswith usage

Fix my previous change, startswith needs a tuple, not a list.

Change-Id: I3df0e711dae7553be1946ece5b41d6407986f588
diff --git a/jeepyb/cmd/create_hound_config.py b/jeepyb/cmd/create_hound_config.py
index 0911646..0cb529f 100644
--- a/jeepyb/cmd/create_hound_config.py
+++ b/jeepyb/cmd/create_hound_config.py
@@ -35,7 +35,7 @@
     for project in projects:
         # Ignore attic and stackforge, those are repos that are not
         # active anymore.
-        if project.startswith(['openstack-attic', 'stackforge']):
+        if project.startswith(('openstack-attic', 'stackforge')):
             continue
         basename = os.path.basename(project)
         # ignore deb- projects that are forks of other projects intended for