Powershell build.ps1 script throws error logging an error

[goofballLogic]

If an error occurs during the CoreCLR run, it tries to execute a cmd-let called "Error-Log" which, at least on my system, is not defined:

Error-Log : The term 'Error-Log' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\src\json-ld.net\build.ps1:61 char:5
+     Error-Log "Tests failed!!!"
+     ~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Error-Log:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Note that the .NET 4 version of the run doesn't use this cmdlet - instead it just uses Write-Host.

Am I doing something wrong or should I send a PR to use Write-Host for the CoreCLR portion too?

This is in reference to https://github.com/NuGet/json-ld.net/blob/master/build.ps1#L58