Benchmarks

Contents of `test/benchmarks`

```
ARES-6
jetstream
Kraken
Octane
Octane_Closure
SunSpider
```

Should we add or update anything? One thing I can think from the top of my head, is that Jetstream has a new version (which also includes Wasm).

@chicoxyzzy and @zenparsing what do you think about this from set standards point of veiw?

@RTSMikeM, since you brought up an interesting use for the engine, do you have any input into how you would see evaluating its performance?