create benchmarks for Jekejeke test programs

[mndrix]

Jekejeke Prolog has several sample programs which seem to benchmark useful aspects of a Prolog implementation. Create Go Benchmark functions for each one.

[ghost]

We started a GitHub repository with all our Benchmarks., It can be found here:
https://github.com/jburse/jekejeke-samples

We will gradually move benchmark suites to there. At the moment I have uploaded
the benchmark suite for the upcoming module "distributed".