Run SomSom benchmarks 5 times (#44)

rebench.conf

@@ -71,6 +71,7 @@ benchmark_suites:
         gauge_adapter: RebenchLog
         command: "-cp Smalltalk:Examples/Benchmarks/LanguageFeatures Examples/Benchmarks/BenchmarkHarness.som --gc %(benchmark)s %(iterations)s "
         iterations: 1
+        invocations: 5
         benchmarks:
             - Loop:         {extra_args: 40, machines: [yuria3]}
             - Queens:       {extra_args: 10, machines: [yuria2]}