Upgraded //y2012 to use the common drive code.

This is a fixup from changing the call signature of DoCoerceGoal

Change-Id: I6a99f666bebd9a728f42083a9c0280e8f2dab295
diff --git a/y2012/control_loops/drivetrain/drivetrain_main.cc b/y2012/control_loops/drivetrain/drivetrain_main.cc
index ddff516..cb453f5 100644
--- a/y2012/control_loops/drivetrain/drivetrain_main.cc
+++ b/y2012/control_loops/drivetrain/drivetrain_main.cc
@@ -1,10 +1,14 @@
-#include "y2012/control_loops/drivetrain/drivetrain.h"
-
 #include "aos/linux_code/init.h"
 
+#include "frc971/control_loops/drivetrain/drivetrain.h"
+#include "y2012/control_loops/drivetrain/drivetrain_base.h"
+
+using ::frc971::control_loops::drivetrain::DrivetrainLoop;
+
 int main() {
   ::aos::Init();
-  ::y2012::control_loops::drivetrain::DrivetrainLoop drivetrain;
+  DrivetrainLoop drivetrain(
+      ::y2012::control_loops::drivetrain::GetDrivetrainConfig());
   drivetrain.Run();
   ::aos::Cleanup();
   return 0;