update the information about enabled vs not

With the roboRIO, we get different information about whether motors are
enabled (and some about sensors too), so the system for propagating it
around to everything needs to change.

Change-Id: I7e5f9591eeac1fdfe57b271333c3827431fbef01
diff --git a/frc971/wpilib/loop_output_handler.cc b/frc971/wpilib/loop_output_handler.cc
index b7b112e..cb5e4ec 100644
--- a/frc971/wpilib/loop_output_handler.cc
+++ b/frc971/wpilib/loop_output_handler.cc
@@ -21,16 +21,16 @@
 
   ::aos::SetCurrentThreadRealtimePriority(30);
   while (run_) {
-    no_robot_state_.Print();
-    fake_robot_state_.Print();
+    no_joystick_state_.Print();
+    fake_joystick_state_.Print();
     Read();
-    ::aos::robot_state.FetchLatest();
-    if (!::aos::robot_state.get()) {
-      LOG_INTERVAL(no_robot_state_);
+    ::aos::joystick_state.FetchLatest();
+    if (!::aos::joystick_state.get()) {
+      LOG_INTERVAL(no_joystick_state_);
       continue;
     }
-    if (::aos::robot_state->fake) {
-      LOG_INTERVAL(fake_robot_state_);
+    if (::aos::joystick_state->fake) {
+      LOG_INTERVAL(fake_joystick_state_);
       continue;
     }