Support private builds of .NET Runtime

[adamsitnik]

It would be great if we could benchmark private builds of .NET Runtime.

All we need to do is not to copy supportedRuntime node from app.config :

<startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
 </startup>

Sample code:

Job.Default.With(new ClrRuntime(version: "4.0"))

This sends the provided version as COMPLUS_Version env var to the benchmarked process.

[vitek-karas]

Thanks a lot Adam. Just tried this out and it works like a charm.