fix argv in examples

Author: liudongmiao

examples/reading_logs_via_rule_message/simple_request.cc

@@ -29,7 +29,7 @@ int main(int argc, char **argv) {
         return -1;
     }
 
-    char *rule = *(argv++);
+    char *rule = *(++argv);
     std::string rules(rule);
     ReadingLogsViaRuleMessage rlvrm(request_header, request_uri, request_body,
         response_headers, response_body, ip, rules);

examples/using_bodies_in_chunks/simple_request.cc

@@ -133,7 +133,7 @@ int main(int argc, char **argv) {
         std::cout << std::endl << std::endl;
         return -1;
     }
-    char *rule = *(argv++);
+    char *rule = *(++argv);
     std::string rules_arg(rule);
 
     /**