builtin: execute app whose filename is longer than NAME_MAX

MIRTOS-360

Change-Id: I0d8ed47c0391e65467cc8a2f4f499b0fbfa8c122
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>

libs/libc/builtin/lib_builtin_isavail.c

@@ -82,7 +82,7 @@ int builtin_isavail(FAR const char *appname)
 
   for (i = 0; (name = builtin_getname(i)) != NULL; i++)
     {
-      if (strncmp(name, appname, NAME_MAX) == 0)
+      if (strcmp(name, appname) == 0)
         {
           return i;
         }