Add BoringSSL and CIRCL kyber768 benchmarks.

[xvzcf]

No description provided.

[franziskuskiefer]

Please add readmes with instructions no how run it and how to interpret the results.

I get these numbers.

CIRCL

BenchmarkKeyGeneration-10          28485             40193 ns/op
BenchmarkEncapsulation-10          26870             44287 ns/op
BenchmarkDecapsulation-10          24258             49165 ns/op

BoringSSL

Each Key-generation operation took 0.032474 milliseconds.
Each Encapsulation operation took 0.028555 milliseconds.
Each Decapsulation operation took 0.035148 milliseconds.

If I'm reading this right it means that boring is faster than circl?

[franziskuskiefer]

Please add the release and then merge it.
We still need to figure out what's going on though.