[components][syslog] fix issues of syslog interface.

Author: 1413577909

components/utilities/ulog/syslog/syslog.c

@@ -94,7 +94,7 @@ void vsyslog(int priority, const char *format, va_list args)
         priority |= local_facility;
     }
 
-    ulog_voutput(priority, local_ident, RT_TRUE, format, args);
+    ulog_voutput(priority, local_ident, RT_TRUE, RT_TRUE, 0, 0, 0, format, args);
 }
 
 /**

components/utilities/ulog/ulog.h

@@ -93,6 +93,8 @@ void ulog_hexdump(const char *tag, rt_size_t width, const rt_uint8_t *buf, rt_si
  * Another log output API. This API is more difficult to use than LOG_X API.
  */
 void ulog_output(rt_uint32_t level, const char *tag, rt_bool_t newline, const char *format, ...);
+void ulog_voutput(rt_uint32_t level, const char *tag, rt_bool_t newline, const rt_uint8_t *hex_buf,
+     rt_size_t hex_size, rt_size_t hex_width, rt_base_t hex_addr, const char *format, va_list args);
 void ulog_raw(const char *format, ...);
 
 #ifdef __cplusplus