Atomic operations doesn't work for non-aligned pointers.

=[log]=> dump/zdtm/static/autofs/30/2/restore.log
------------------------ grep Error ------------------------
(00.185037)      5: Error (/root/git/criu/criu/include/lock.h:78): BUG at /root/git/criu/criu/include/lock.h:78
(00.207193) Error (cr-restore.c:1407): 100 killed by signal 9: Killed
(00.219187) Error (cr-restore.c:2237): Restoring FAILED.
------------------------ ERROR OVER ------------------------

4339  futex(0x7fa79c1561da, FUTEX_WAKE, 2147483647 <unfinished ...>
4339  <... futex resumed> )             = -1 EINVAL (Invalid argument)
Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>