Automatically generate the drivetrain constants.

Change-Id: Ib96f7d55734d44d8ac9d918ec90edf3b1fb46cd3
diff --git a/y2014/control_loops/python/BUILD b/y2014/control_loops/python/BUILD
new file mode 100644
index 0000000..232d128
--- /dev/null
+++ b/y2014/control_loops/python/BUILD
@@ -0,0 +1,11 @@
+package(default_visibility = ['//y2014:__subpackages__'])
+
+py_binary(
+  name = 'drivetrain',
+  srcs = [
+    'drivetrain.py',
+  ],
+  deps = [
+    '//frc971/control_loops/python:controls',
+  ]
+)