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.sh

@@ -135,6 +135,13 @@ function InitializeDotNetCli {
   # build steps from using anything other than what we've downloaded.
   export PATH="$dotnet_root:$PATH"
 
+  if [[ $ci == true ]]; then
+    # Make Sure that our bootstrapped dotnet cli is avaliable in future steps of the Azure Pipelines build
+    echo "##vso[task.prependpath]$dotnet_root"
+    echo "##vso[task.setvariable variable=DOTNET_MULTILEVEL_LOOKUP]0"
+    echo "##vso[task.setvariable variable=DOTNET_SKIP_FIRST_TIME_EXPERIENCE]1"
+  fi
+
   # return value
   _InitializeDotNetCli="$dotnet_root"
 }