Update dependencies from https://github.com/dotnet/arcade build 20190110.8

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19060.8

eng/common/tools.ps1

@@ -141,6 +141,13 @@ function InitializeDotNetCli([bool]$install) {
   # It also ensures that VS msbuild will use the downloaded sdk targets.
   $env:PATH = "$dotnetRoot;$env:PATH"
 
+  if ($ci) {
+    # Make Sure that our bootstrapped dotnet cli is avaliable in future steps of the Azure Pipelines build
+    Write-Host "##vso[task.prependpath]$dotnetRoot"
+    Write-Host "##vso[task.setvariable variable=DOTNET_MULTILEVEL_LOOKUP]0"
+    Write-Host "##vso[task.setvariable variable=DOTNET_SKIP_FIRST_TIME_EXPERIENCE]1"
+  }
+
   return $global:_DotNetInstallDir = $dotnetRoot
 }