Add missing dependency

Change-Id: I9a5f198bd44eca393391ae1271bf616ca2e30070
diff --git a/frc971/wpilib/BUILD b/frc971/wpilib/BUILD
index 66d4070..c07b7f8 100644
--- a/frc971/wpilib/BUILD
+++ b/frc971/wpilib/BUILD
@@ -84,6 +84,7 @@
   deps = [
     '//aos/externals:wpilib',
     '//aos/common/logging',
+    '//aos/common:time',
   ],
 )