Set up for using WPILib 2016

It works if you switch which line in //aos/externals:BUILD is commented
out.

Change-Id: I19f4d7a1d95554cff0dc29f9fd4a163b9d0cafd5
diff --git a/frc971/wpilib/LPD8806.h b/frc971/wpilib/LPD8806.h
index 48f17ae..84c4667 100644
--- a/frc971/wpilib/LPD8806.h
+++ b/frc971/wpilib/LPD8806.h
@@ -7,6 +7,7 @@
 #include "aos/common/mutex.h"
 
 #include "SPI.h"
+#undef ERROR
 
 namespace frc971 {
 namespace wpilib {