stdlib: Undo post review change to 16adc58e [BZ #27749]

Post review removal of "goto restart" from
https://sourceware.org/pipermail/libc-alpha/2021-April/125470.html


introduced a bug when some atexit handers skipped.

Signed-off-by: Vitaly Buka <vitalybuka@google.com>

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>