Log the ClangSharpPInvokeGeneratorPath and ensure the script doesn't fail for missing tools (#497)

scripts/CommonUtils.ps1

@@ -46,16 +46,16 @@ function Install-DotNetTool
 
     if ($Version -ne '')
     {
-        $installed = & dotnet tool list -g | select-string "$Name\s+$Version"
-        if (!$installed.Length)
+        $installed = & dotnet tool list -g | select-string -Pattern "$Name\s+$Version" -Raw
+        if (($installed -eq $null) -or !$installed.Length)
         {
             & dotnet tool update --global $Name --version $Version
         }
     }
     else
     {
-        $installed = & dotnet tool list -g | select-string "$Name"
-        if (!$installed.Length)
+        $installed = & dotnet tool list -g | select-string -Pattern "$Name" -Raw
+        if (($installed -eq $null) -or !$installed.Length)
         {
             & dotnet tool update --global $Name
         }

scripts/GenerateMetadataSource.ps1

@@ -42,6 +42,7 @@ $partitionNames = Get-ChildItem $partitionsDir | Select-Object -ExpandProperty N
 $stopwatch =  [system.diagnostics.stopwatch]::StartNew()
 
 Write-Output "`nProcessing each partition...using $throttleCount parallel script(s)"
+Write-Output "ClangSharpPInvokeGenerator resolved to $((Get-Command ClangSharpPInvokeGenerator).Path)"
 
 $errObj = new-object psobject
 Add-Member -InputObject $errObj -MemberType NoteProperty -Name ErrorCode -Value 0