Prefix LOG and CHECK with AOS_

This prepares us for introducing glog more widely and transitioning
things over where they make sense.

Change-Id: Ic6c208882407bc2153fe875ffc736d66f5c8ade5
diff --git a/frc971/wpilib/wpilib_robot_base.h b/frc971/wpilib/wpilib_robot_base.h
index ef3ec31..86672c4 100644
--- a/frc971/wpilib/wpilib_robot_base.h
+++ b/frc971/wpilib/wpilib_robot_base.h
@@ -28,7 +28,7 @@
       thread.join();
     }
 
-    LOG(ERROR, "Exiting WPILibRobot\n");
+    AOS_LOG(ERROR, "Exiting WPILibRobot\n");
 
     ::aos::Cleanup();
   }