flimflam: Enable -Wimplicit-function-declaration.

plugins/crosmetrics.c

 /*
  *  Chrome OS Metrics - collect and record metrics data through UMA
  *
  *  This file initially created by Google, Inc.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
 
 #if 0
 #define CONFIG_PSB_SUPPORT              /* enable Public Safety Band support */
 #endif
 
+#include <ctype.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include <metrics/c_metrics_library.h>
 
 #define CONNMAN_API_SUBJECT_TO_CHANGE
 #include <connman/plugin.h>
 #include <connman/notifier.h>
 #include <connman/network.h>
 #include <connman/service.h>
 #include <connman/log.h>
 
@@ skipping 293 matching lines @@
 }
 
 static void metrics_finis(void)
 {
         CMetricsLibraryDelete(lib);
         connman_notifier_unregister(&metrics_notifier);
 }
 
 CONNMAN_PLUGIN_DEFINE(crosmetrics, "Chrome OS metrics plugin", VERSION,
                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, metrics_init, metrics_finis)