Add drivetrain_main for 2019 robot

Needs masses and controller still tuned.

Change-Id: I29d62286b2941238abb9770a21e764148fbb688b
diff --git a/y2019/control_loops/drivetrain/drivetrain_main.cc b/y2019/control_loops/drivetrain/drivetrain_main.cc
new file mode 100644
index 0000000..c872622
--- /dev/null
+++ b/y2019/control_loops/drivetrain/drivetrain_main.cc
@@ -0,0 +1,15 @@
+#include "aos/init.h"
+
+#include "frc971/control_loops/drivetrain/drivetrain.h"
+#include "y2019/control_loops/drivetrain/drivetrain_base.h"
+
+using ::frc971::control_loops::drivetrain::DrivetrainLoop;
+
+int main() {
+  ::aos::Init();
+  DrivetrainLoop drivetrain(
+      ::y2019::control_loops::drivetrain::GetDrivetrainConfig());
+  drivetrain.Run();
+  ::aos::Cleanup();
+  return 0;
+}