buildrelease.bat uses same build directory for AMD64 and ARM64

[adang1345]

Bug report

Bug description:

When I build Python 3.11.10 installers using Tools\msi\buildrelease.bat -x64 -arm64, the AMD64 files under PCbuild\amd64\en-us are deleted when the ARM64 build starts.

This is due to a typo in the build directory for ARM64 in Tools\msi\buildrelease.bat, which has set BUILD=%Py_OutDir%amd64\. This build directory conflicts with that for AMD64 and should instead be set BUILD=%Py_OutDir%arm64\. I'll create a PR.

CPython versions tested on:

3.11

Operating systems tested on:

Windows

Linked PRs

• gh-123915: Ensure that AMD64 and ARM64 builds use different directories #123918
• [3.13] gh-123915: Ensure that Windows AMD64 and ARM64 release builds use different directories (GH-123918) #123921
• [3.12] gh-123915: Ensure that Windows AMD64 and ARM64 release builds use different directories (GH-123918) #123922

[zooba]

Thanks!