[master] Update dependencies from dotnet/arcade (#6348)

* Update dependencies from https://github.com/dotnet/arcade build 20200211.11

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20111.11

* Update dependencies from https://github.com/dotnet/arcade build 20200212.7

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20112.7

eng/common/tools.ps1

@@ -399,7 +399,12 @@ function LocateVisualStudio([object]$vsRequirements = $null){
   if (!(Test-Path $vsWhereExe)) {
     Create-Directory $vsWhereDir
     Write-Host 'Downloading vswhere'
-    Invoke-WebRequest "https://github.com/Microsoft/vswhere/releases/download/$vswhereVersion/vswhere.exe" -OutFile $vswhereExe
+    try {
+      Invoke-WebRequest "https://netcorenativeassets.blob.core.windows.net/resource-packages/external/windows/vswhere/$vswhereVersion/vswhere.exe" -OutFile $vswhereExe
+    }
+    catch {
+      Write-PipelineTelemetryError -Category 'InitializeToolset' -Message $_
+    }
   }
 
   if (!$vsRequirements) { $vsRequirements = $GlobalJson.tools.vs }