Pass voltage through to the trajectory python wrapper.

Add dependencies on python_init at suggestion of Brian.

Change-Id: I4fc7394bbe891115cf05f8604f2dde398f40e75f
diff --git a/frc971/control_loops/python/BUILD b/frc971/control_loops/python/BUILD
index 705aa38..9080e9a 100644
--- a/frc971/control_loops/python/BUILD
+++ b/frc971/control_loops/python/BUILD
@@ -84,6 +84,9 @@
     data = [
         "//frc971/control_loops/drivetrain:spline.so",
     ],
+    deps = [
+        ":python_init",
+    ],
 )
 
 py_test(
@@ -93,6 +96,7 @@
     ],
     deps = [
         ":libspline",
+        ":python_init",
     ]
 )