Update builder for ARM.

ArmBuild.ps1

@@ -0,0 +1,53 @@
+$ErrorActionPreference = "Stop"
+
+$root    = Split-Path -Parent $MyInvocation.MyCommand.Path
+$staging = Join-Path $root "_staging"
+$outZip  = Join-Path $root "package.zip"
+
+function Copy-Binaries-ToRoot($src)
+{
+    if (!(Test-Path $src)) { return }
+
+    Get-ChildItem $src -File | Where-Object {
+        $_.Extension -in ".exe", ".dll"
+    } | ForEach-Object {
+        Copy-Item $_.FullName $staging -Force
+    }
+}
+
+Write-Host "Preparing staging..."
+Remove-Item $staging -Recurse -Force -ErrorAction Ignore
+New-Item $staging -ItemType Directory | Out-Null
+
+# ① 先放 Release
+Copy-Binaries-ToRoot (Join-Path $root "Release")
+
+# ② 再放 ARM\Release（覆盖同名）
+Copy-Binaries-ToRoot (Join-Path $root "ARM\Release")
+
+# ③ shared 全部铺到根目录
+$shared = Join-Path $root "shared"
+if (Test-Path $shared) {
+    Get-ChildItem $shared -Recurse | ForEach-Object {
+        $rel = $_.FullName.Substring($shared.Length).TrimStart('\')
+        $dest = Join-Path $staging $rel
+
+        if ($_.PSIsContainer) {
+            New-Item $dest -ItemType Directory -Force | Out-Null
+        } else {
+            Copy-Item $_.FullName $dest -Force
+        }
+    }
+}
+
+Write-Host "Creating ZIP..."
+if (Test-Path $outZip) { Remove-Item $outZip -Force }
+
+Compress-Archive `
+    -Path (Join-Path $staging "*") `
+    -DestinationPath $outZip `
+    -CompressionLevel Fastest
+
+Remove-Item $staging -Recurse -Force
+
+Write-Host "Done: $outZip"