Changing y2016 to absl::call_once()

Change-Id: I327fceef13f310ea657c1c0a71ba58960e2f1e3b
diff --git a/y2016/BUILD b/y2016/BUILD
index 1f426c6..ee77f00 100644
--- a/y2016/BUILD
+++ b/y2016/BUILD
@@ -10,7 +10,7 @@
     ],
     visibility = ["//visibility:public"],
     deps = [
-        "//aos:once",
+        "@com_google_absl//absl/base",
         "//aos/logging",
         "//aos/mutex",
         "//aos/network:team_number",