Return the AIO check

Linus about AIO: https://lwn.net/Articles/671657/
LWN: Fixing asynchronous I/O, again: https://lwn.net/Articles/671649/

kconfig_hardened_check/__init__.py

@@ -668,6 +668,7 @@ def add_kconfig_checks(l, arch):
     l += [KconfigCheck('cut_attack_surface', 'my', 'VIDEO_VIVID', 'is not set')]
     l += [KconfigCheck('cut_attack_surface', 'my', 'INPUT_EVBUG', 'is not set')] # Can be used as a keylogger
     l += [KconfigCheck('cut_attack_surface', 'my', 'KGDB', 'is not set')]
+    l += [KconfigCheck('cut_attack_surface', 'my', 'AIO', 'is not set')]
     l += [OR(KconfigCheck('cut_attack_surface', 'my', 'TRIM_UNUSED_KSYMS', 'y'),
              modules_not_set)]