[fix compile] winutil used by another process (ChrisTitusTech#2680)

* fix winutil used by another process

- remove winutil.ps1 if it is readonly (also works if another process is using it) to minimize failed compiles.

* fix action error

* Oops, typo

* make it more compact

Compile.ps1

@@ -4,6 +4,11 @@ param (
     [switch]$SkipPreprocessing,
     [string]$Arguments
 )
+
+if ((Get-Item ".\winutil.ps1" -ErrorAction SilentlyContinue).IsReadOnly) {
+    Remove-Item ".\winutil.ps1" -Force
+}
+
 $OFS = "`r`n"
 $scriptname = "winutil.ps1"
 $workingdir = $PSScriptRoot