Add 90s variants of Kyber

Fix CRYPTO_ALGNAME

Add duplicate consistency files

Fixed sampler bug (update to new upstream Falcon code 2019-09-18).

* Ignore pointless clang-tidy warning.

It wants you to write type suffixes for integers using uppercase. Let's
just disable this warning.

https://clang.llvm.org/extra/clang-tidy/checks/readability-uppercase-literal-suffix.html

* Clean up bugprone-narrowing-conversion

Check and fix consistency of scheme names

Fix incremental sha512

* Integrate Kyber-AVX2 into PQClean

* Fix types and formatting in Kyber

* Workaround a valgrind crash

* Remove comment in shuffle.s

* Remove some extraneous truncations

* fixup! Fix types and formatting in Kyber

* Add support for specifying architecture and feature limits

* cpuinfo not supported on ppc

* Detect 32-bit python interpreter on 64-bit CPU

* Fix bugs in isolated tests

* Also support restricting operating system

* Enable valgrind exit errorcode

It seems we were not doing anything with the valgrind results... D:

* Use --exit-on-first-error if available

* Revert "Merge pull request #182 from PQClean/rainbow"

This reverts commit 8a008417fe988b48c8acc4aefc9c299a4d3c1645, reversing
changes made to d4b612fe9a.

update LEDA to v2.1

Run KEMs and SIGs as separate CI jobs

Use Python's built-in ``diflib`` to compute diffs between the two versions.

They are beginning to block the pipeline for too long.

[ci skip]

* Reduce pytest xml log size
* store artifact to debug
* Fix test result path

Fix SPHINCS+ clang-tidy warnings.

Reduce the number of test runs for Valgrind tests

Disable clang-tidy on i386

Fixed some buffer handling bugs that should never happen in practice

Add abstract state duplication for SHA256 incremental hashing API