Add leon factory to cbuildbot_config.py

This will enable leon factory builder.

BUG=chromium:287774
TEST=./cbuildbot_commands_unittest.py

Change-Id: Iaae5c89a3f120bb98eaf8869594d73bfa1e1039f
Reviewed-on: https://chromium-review.googlesource.com/169030
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Yung Leem <yungleem@chromium.org>
Commit-Queue: Yung Leem <yungleem@chromium.org>
diff --git a/buildbot/cbuildbot_config.py b/buildbot/cbuildbot_config.py
index 6026561..51c0fad 100755
--- a/buildbot/cbuildbot_config.py
+++ b/buildbot/cbuildbot_config.py
@@ -1625,6 +1625,10 @@
   boards=['falco'],
 )
 
+_factory_release.add_config('leon-factory',
+  boards=['leon'],
+)
+
 _factory_release.add_config('peppy-factory',
   boards=['peppy'],
 )