* Fix bug in the output of the ct_verify function
A bug in the CCA transformation was reported on the pqc-forum on 2020-12-10
https://groups.google.com/a/list.nist.gov/g/pqc-forum/c/kSUKzDNc5ME
It was fixed today in 669522db63.
This commit ports that fix to PQClean
* add note to SECURITY.md
* update upstream commit in META.yml
As identified in: Qian Guo, Thomas Johansson, Alexander Nilsson. A
key-recovery timing attack on post-quantum primitives using the
Fujisaki-Okamoto transformation and its application on FrodoKEM. In
CRYPTO 2020.
Based on
155c24c3df
* fix prototypes for sphincs and static functions in aes.c
* fix missing prototypes in all frodo variants
* fix missing prototypes in kyber
* remove const from non-pointer arguments in Frodo
* add missing prototypes to requirements in README
