Enable Spark motor controllers

Change-Id: Iafb3c2ab2b5cf8e67a327b548db54425223be7b9
diff --git a/third_party/allwpilib_2018/BUILD b/third_party/allwpilib_2018/BUILD
index 852f8b4..38d9559 100644
--- a/third_party/allwpilib_2018/BUILD
+++ b/third_party/allwpilib_2018/BUILD
@@ -61,7 +61,7 @@
   #'SafePWM',
   #'SerialHelper',
   #'SerialPort',
-  'Spark',
+  #'Spark',
   #'SpeedController',
   'TalonSRX',
   'Ultrasonic',