[kenel] add static name for rt_object

Author: mysterywolf

include/rtdef.h

@@ -398,7 +398,11 @@ typedef struct rt_slist_node rt_slist_t;                /**< Type for single lis
  */
 struct rt_object
 {
-    char       name[RT_NAME_MAX];                       /**< name of kernel object */
+#if RT_NAME_MAX == 0
+    char      *name;                                    /**< static name of kernel object */
+#else
+    char       name[RT_NAME_MAX];                       /**< dynamic name of kernel object */
+#endif
     rt_uint8_t type;                                    /**< type of kernel object */
     rt_uint8_t flag;                                    /**< flag of kernel object */
 

src/Kconfig

@@ -2,7 +2,7 @@ menu "RT-Thread Kernel"
 
 config RT_NAME_MAX
     int "The maximal size of kernel object name"
-    range 2 32
+    range 0 64
     default 8
     help
         Each kernel object, such as thread, timer, semaphore etc, has a name,