sched: Move argv from tcb_s to task_info_s

argv is allocated from stack and then belong to userspace,
so task_info_s is a best location to hold this information.

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

fs/procfs/fs_procfsproc.c

@@ -635,7 +635,6 @@ static ssize_t proc_cmdline(FAR struct proc_file_s *procfile,
                             FAR struct tcb_s *tcb, FAR char *buffer,
                             size_t buflen, off_t offset)
 {
-  FAR struct task_tcb_s *ttcb;
   FAR const char *name;
   FAR char **argv;
   size_t remaining;
@@ -689,9 +688,7 @@ static ssize_t proc_cmdline(FAR struct proc_file_s *procfile,
 
   /* Show the task argument list (skipping over the name) */
 
-  ttcb = (FAR struct task_tcb_s *)tcb;
-
-  for (argv = ttcb->argv + 1; *argv; argv++)
+  for (argv = tcb->group->tg_info->argv + 1; *argv; argv++)
     {
       linesize   = procfs_snprintf(procfile->line, STATUS_LINELEN,
                                    " %s", *argv);