criu/dump: Fix size of personality buffer

Personality value is printed in kernel like this:
static int proc_pid_personality(/* .. */)
{
        int err = lock_trace(task);
        if (!err) {
                seq_printf(m, "%08x\n", task->personality);
                unlock_trace(task);
        }
        return err;
}

So, we don't need a whole page to read the value.
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

criu/cr-dump.c

@@ -97,7 +97,8 @@ int __attribute__((weak)) arch_set_thread_regs(struct pstree_item *item,
 	return 0;
 }
 
-static char loc_buf[PAGE_SIZE];
+#define PERSONALITY_LENGTH	9
+static char loc_buf[PERSONALITY_LENGTH];
 
 void free_mappings(struct vm_area_list *vma_area_list)
 {