Random number generation

[RobertBendun]

• [x] Add rdrand instruction as random64 and random32
• [ ] Add uniform64 and uniform32, such that b a uniform returns integer in [a,b] with probability of 1 / (b - a + 1)

See also

• RDRAND
• RDSEED
• std::uniform_int_distribution
• https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
• https://lemire.me/blog/2016/06/30/fast-random-shuffling/
• https://arxiv.org/abs/1012.4290