[build] Fix PATH setting in build.ps1

Author: AndreyAkinshin

build/build.ps1

@@ -58,11 +58,10 @@ if (!(Test-Path $InstallPath)) {
  $ScriptPath = Join-Path $InstallPath 'dotnet-install.ps1'
  (New-Object System.Net.WebClient).DownloadFile($DotNetInstallerUri, $ScriptPath);
  & $ScriptPath -JSonFile $GlobalJsonPath -InstallDir $InstallPath;
-
- Remove-PathVariable "$InstallPath"
- $env:PATH = "$InstallPath;$env:PATH"
 }
 
+Remove-PathVariable "$InstallPath"
+$env:PATH = "$InstallPath;$env:PATH"
 $env:DOTNET_ROOT=$InstallPath
 
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