Load spline jsons for autonomous

Change-Id: I70f495255210eb5c9cfe041332ee8723cfcf1e2f
diff --git a/y2020/BUILD b/y2020/BUILD
index a759681..63034ae 100644
--- a/y2020/BUILD
+++ b/y2020/BUILD
@@ -11,6 +11,9 @@
     data = [
         ":config",
     ],
+    dirs = [
+      "//y2020/actors:splines"
+    ],
     start_binaries = [
         "//aos/events/logging:logger_main",
         ":joystick_reader",