Fixed building with a bazel with hdrs_check fixed again.

Change-Id: I015f66cd6e02e07efa367b96edd775015ac0abca
diff --git a/y2014/actors/BUILD b/y2014/actors/BUILD
index e060569..086d8b4 100644
--- a/y2014/actors/BUILD
+++ b/y2014/actors/BUILD
@@ -74,6 +74,7 @@
     ':drivetrain_action_queue',
     '//y2014:constants',
     '//aos/common:time',
+    '//aos/common:math',
     '//aos/common/util:phased_loop',
     '//aos/common/logging',
     '//aos/common/actions:action_lib',