Converted drivetrain to codegen coeffs at buildtime

Change-Id: I41a77751f71d2f990ac49b19c85bc166b10a563b
diff --git a/y2015_bot3/control_loops/drivetrain/BUILD b/y2015_bot3/control_loops/drivetrain/BUILD
index ad1ec39..330626a 100644
--- a/y2015_bot3/control_loops/drivetrain/BUILD
+++ b/y2015_bot3/control_loops/drivetrain/BUILD
@@ -39,6 +39,19 @@
   ],
 )
 
+genrule(
+  name = 'genrule_drivetrain',
+  visibility = ['//visibility:private'],
+  cmd = '$(location //y2015_bot3/control_loops/python:drivetrain) $(OUTS)',
+  tools = [
+    '//y2015_bot3/control_loops/python:drivetrain',
+  ],
+  outs = [
+    'drivetrain_dog_motor_plant.h',
+    'drivetrain_dog_motor_plant.cc',
+  ],
+)
+
 cc_library(
   name = 'drivetrain_lib',
   srcs = [