Add RIPEMD-160 support to the Math API

[artob]

As discussed with @ilblackdragon, @djsatok, and @frankbraun on 2021-02-04, to speed up and lower the cost of the EVM-as-a-contract implementation, we will need to add ripemd160() as a Math API primitive so that the EVM contract itself will not need to implement this hash function.

References:

• https://ethereum.stackexchange.com/questions/15479/list-of-pre-compiled-contracts/15483#15483
• https://docs.soliditylang.org/en/latest/units-and-global-variables.html#mathematical-and-cryptographic-functions
• https://en.wikipedia.org/wiki/RIPEMD