message: Fix reading build commit on Windows
diff: @@ -521,7 +521,9 @@ if ($null -eq $installed -or -not("$($installed.Version).".StartsWith(($version
  if ($version -match $nightly_versions) {
  Invoke-WebRequest -UseBasicParsing -Uri $php_builder/releases/latest/download/Get-PhpNightly.ps1 -OutFile $php_dir\Get-PhpNightly.ps1 > $null 2>&1
  & $php_dir\Get-PhpNightly.ps1 -Architecture $arch -ThreadSafe $ts -Path $php_dir -Version $version > $null 2>&1
  + if(Test-Path $php_dir\COMMIT) {
  $extra_version = " ($( Get-Content $php_dir\COMMIT ))"
  + }
  } else {
  Install-Php -Version $version -Architecture $arch -ThreadSafe $ts -InstallVC -Path $php_dir -TimeZone UTC -InitialPhpIni Production -Force > $null 2>&1
  }
  