Include test vectors for BLS bindings

[iquerejeta]

We should include test vectors from:

• Test vectors from IRTF draft on the Optimal Ate Pairing
• Test vectors created internally, using the zkcrypto library

[lehins]

@iquerejeta #408 is merged, can we close this one as fixed?

[iquerejeta]

Included test vectors for zkcrypto in #408 . Test vectors from the IRTF draft for BLS signatures are being help up because their test vectors seem to be invalid. I notified them, and here is there response I got from one of the draft authors:

I am still waiting to receive from the co-author who created the
generation script of the test vectors listed in I-D.
On the other hand, I have checked by the library mcl and confirmed
that the results by mcl are equal to yours.

https://github.com/herumi/mcl

I'm sorry, but from this situation, we will review the I-D for
possible errors in the test vectors in the I-D.

When the IRTF draft is updated, we will include valid test vectors from there. Until then, closing this as fixed.