Implement the MT2203 generator

   This patch introduces the collection of 6024 Mersenne-Twister
   pseudorandom number generators. Each generator has a period of 2^2203
   and the parameters have been obtained by using the dynamic code
   generator code proposed in:

   M. Matsumoto and T. Nishimura "Dynamic
   Creation of Pseudorandom Number Generators"
   Monte Carlo and Quasi-Monte Carlo Methods, 1998,
   Springer 2000, pp 56-69.

   This generator is particularly useful for Monte Carlo simulations.
   The parameters used do not satisfy bitwise reproducibility with any
   other RNG library, apart from Arm Performance Libraries, we have
   tested it against. The validity of the parameters has been tested
   running the testu01/BigCrush battery of tests. As a comparison, other
   RNG libraries were tested against the same battery of tests and
   similar results were observed in terms of statistical properties of
   the generated numbers.

Co-Authored-By: Kevin Mooney <kevin.mooney@arm.com>
Co-Authored-By: Joe Ramsay <joe.ramsay@arm.com>
Co-Authored-By: Paolo Tricerri <paolo.tricerri@arm.com>