sched: group: Fix memory corruption in group_leave.c

Summary:
- I noticed that nxplayer (HTTP audio streaming) + command execution
  via telnet sometimes causes memory corruption.
  See https://github.com/apache/nuttx/pull/7947 for the detail.
- This commit fixes this issue by calling lib_stream_release() before
  lib_stream_release() in group_leave.c

Impact:
- Should be none

Testing:
- Tested with spresense:wifi_smp

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

sched/group/group_leave.c

@@ -156,6 +156,12 @@ static inline void group_release(FAR struct task_group_s *group)
   pthread_release(group);
 #endif
 
+#ifdef CONFIG_FILE_STREAM
+  /* Free resource held by the stream list */
+
+  lib_stream_release(group);
+#endif /* CONFIG_FILE_STREAM */
+
   /* Free all file-related resources now.  We really need to close files as
    * soon as possible while we still have a functioning task.
    */
@@ -164,12 +170,6 @@ static inline void group_release(FAR struct task_group_s *group)
 
   files_releaselist(&group->tg_filelist);
 
-#ifdef CONFIG_FILE_STREAM
-  /* Free resource held by the stream list */
-
-  lib_stream_release(group);
-#endif /* CONFIG_FILE_STREAM */
-
 #ifndef CONFIG_DISABLE_ENVIRON
   /* Release all shared environment variables */