sched/spawn: Support task_spawnattr_[set|get]stacksize in kernel mode

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Signed-off-by: chao an <anchao@xiaomi.com>

binfmt/binfmt_exec.c

@@ -106,12 +106,10 @@ int exec_spawn(FAR const char *filename, FAR char * const *argv,
           bin->priority = attr->priority;
         }
 
-#ifndef CONFIG_BUILD_KERNEL
       if (attr->stacksize > 0)
         {
           bin->stacksize = attr->stacksize;
         }
-#endif
     }
 
   /* Disable pre-emption so that the executed module does