Add new parameter set to Get-ClrStack

[dronkoff]

It would be great if Get-ClrStack will be able to accept instances of MS.Dbg.DbgThreadContainer as an input so it will be able to use in the pipeline.

PS Dbg:\NetDebugDemos_16124\Threads
> Get-ChildItem | Get-ClrStack

[jazzdelightsme]

Thanks for filing these. There is whole bunch of improvement that needs to happen for managed code support, and it's great to have some very specific items that we can track.