Add drivetrain status forwarding and show on field

Change-Id: Iba6010e1aca3d795968f9abf2e9cbbe6e72b2163
diff --git a/y2020/www/BUILD b/y2020/www/BUILD
index 6b27c66..a8b0c67 100644
--- a/y2020/www/BUILD
+++ b/y2020/www/BUILD
@@ -26,6 +26,7 @@
     deps = [
         "//aos/network/www:proxy",
         "//y2020/vision/sift:sift_ts_fbs",
+        "//frc971/control_loops/drivetrain:drivetrain_status_ts_fbs",
     ],
 )