Build polytope python test with Bazel

Change-Id: Ia4616d7de792717d3da23810e8e4c6490db8e7a6
diff --git a/frc971/control_loops/python/polytope_test.py b/frc971/control_loops/python/polytope_test.py
index 9a35ebe..51bf6fd 100755
--- a/frc971/control_loops/python/polytope_test.py
+++ b/frc971/control_loops/python/polytope_test.py
@@ -2,9 +2,10 @@
 
 import numpy
 from numpy.testing import *
-import polytope
 import unittest
 
+import frc971.control_loops.python.polytope as polytope
+
 __author__ = 'Austin Schuh (austin.linux@gmail.com)'
 
 def MakePoint(*args):