Changed configuration.cc from aos::Once() to absl::call_once()

Change-Id: I213c6a980664c0f6e94d8ef5c3e3dcc98b8d1043
diff --git a/aos/BUILD b/aos/BUILD
index 206eefb..e918d7f 100644
--- a/aos/BUILD
+++ b/aos/BUILD
@@ -395,7 +395,7 @@
         ":flatbuffer_merge",
         ":flatbuffers",
         ":json_to_flatbuffer",
-        "//aos:once",
+        "@com_google_absl//absl/base",
         "//aos:unique_malloc_ptr",
         "//aos/logging",
         "//aos/util:file",