TJEC and AES128-CTR-DRBG random source

[MarcasRealAccount]

This Pull Request replaces the Mersenne Twister random source for a better combination of Time Jitter Entropy Collector in conjunction with AES128 in Counter mode as a Deterministic Random Bit Generator.
The following options are added
tjec-random-access: Makes the underlying memory accessing randomized using a xoshiro128** prng.
tjec-max-memory-size=<byte count>: Allows the TJEC-Memory to be at most byte count bytes rounded up to nearest power of two.
tjec-no-fips: Makes TJEC only retrieve 256 bits of potential entropy per 256 bits generated.
tjec-no-lag-predictor: Disables the LAG Predictor health check.
tjec-max-acc-loop-bits=<1-8>: Specifies a maximum number of random additional memory accesses to make in 2^k, default is 7 or 128.
tjec-max-hash-loop-bits=<1-8>: Specifies a maximum number of random additional hash iterations to make in 2^k, default is 3 or 8.
tjec-osr=<1-255>: Specifies the over sampling ratio, i.e. how many multiples of 256 bits of potential entropy to collect per 256 bits generated.

[oberrow]

After a quick read, this looks fine. My only comment is that if you added new kernel command line options, is that you should add them to the usage message in cmdline.c
I will be doing a more thorough review later.

[oberrow]

Merged.