redid the old benchmarks

With #26 out of the way, was able to get meaningful rubyx benchmarks. Meaning loops large enough for the exec time to go significantly over the noop.
Did mruby too and as expected got much lower noop

test/bench/c/hello.c

@@ -2,6 +2,7 @@
 
 int main(void)
 {
+  setbuf(stdout, NULL); /* to make it equivalent to the other versions, otherwise it caches */
   int counter = 100000;
 	while(counter--) {
     printf("Hello there\n");