Initialized glog in polydrivetrain.py

Change-Id: I21d53481ef01d4bfc99eccef9a0141f71006401f
diff --git a/y2017/control_loops/python/polydrivetrain.py b/y2017/control_loops/python/polydrivetrain.py
index 29cb209..df1f18f 100755
--- a/y2017/control_loops/python/polydrivetrain.py
+++ b/y2017/control_loops/python/polydrivetrain.py
@@ -411,8 +411,6 @@
 
 
 def main(argv):
-  argv = FLAGS(argv)
-
   vdrivetrain = VelocityDrivetrain()
 
   if not FLAGS.plot:
@@ -498,4 +496,6 @@
   return 0
 
 if __name__ == '__main__':
-  sys.exit(main(sys.argv))
+  argv = FLAGS(sys.argv)
+  glog.init()
+  sys.exit(main(argv))