Change y2014 to absl::call_once

Change-Id: I7a4631af285f8fe92f6b986ee7f49f501ad50a5c
diff --git a/y2014/BUILD b/y2014/BUILD
index f3569f0..b11f170 100644
--- a/y2014/BUILD
+++ b/y2014/BUILD
@@ -10,7 +10,7 @@
     ],
     visibility = ["//visibility:public"],
     deps = [
-        "//aos:once",
+        "@com_google_absl//absl/base",
         "//aos/logging",
         "//aos/mutex",
         "//aos/network:team_number",