queue size should reflect multibuilds

some jobs have multiple builds, which all increase
the queue size (I'd think?). So let's multiply queue
size by number of concurrent jobs.
diff --git a/src/plugins/scanners/travis.py b/src/plugins/scanners/travis.py
index d7addd5..e753933 100644
--- a/src/plugins/scanners/travis.py
+++ b/src/plugins/scanners/travis.py
@@ -238,7 +238,7 @@
                 if cb:
                     # Is the build currently running?
                     if cb['state'] == 'started':
-                        building += 1
+                        building += len(cb.get('jobs', [1]))
                 
                 # Queue up build jobs for the threaded scanner
                 bid = repo['id']