flimflam: Enable -Wimplicit-function-declaration.

plugins/crypto_rot47.c

 /*
  *  Rot-47 "encryption", obfuscates sensitive data so that it's not visible
  *  on accident.
  *
  * Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
 
 #define CONNMAN_API_SUBJECT_TO_CHANGE
+#include <connman/crypto.h>
+#include <connman/log.h>
 #include <connman/plugin.h>
-#include <connman/crypto.h>
 #include <glib.h>
 #include <string.h>
 
 #define ROT_SIZE 94
 #define ROT_HALF (ROT_SIZE / 2)
 #define ROT_MIN '!'
 #define ROT_MAX  (ROT_MIN + ROT_SIZE)
 
 static char *rotate_encrypt(const char *profile_name,
     const char *key, const char *value);
@@ skipping 38 matching lines @@
 }
 
 static void rotate_finish(void)
 {
         connman_crypto_unregister(&crypto_rot47);
 }
 
 CONNMAN_PLUGIN_DEFINE(crypto_rot47, "Rot47 Plugin", VERSION,
     CONNMAN_PLUGIN_PRIORITY_DEFAULT, rotate_init,
     rotate_finish)