Windows build path changed to add the target architecture

Built executables for Flutter Windows apps are now located in architecture dependent folders.

In preparation for supporting Windows on Arm64, the Windows build path was updated to add the build's target architecture.

Previously, Flutter builds for Windows assumed an x64 target architecture.

You may need to update your infrastructure to use the new Flutter Windows build path.

Example build path before the migration:

build\windows\runner\Release\hello_world.exe

Example build path after the migration if targeting x64:

build\windows\x64\runner\Release\hello_world.exe

Example build path after the migration if targeting Arm64:

build\windows\arm64\runner\Release\hello_world.exe

If you use package:msix, update to version 3.16.7 or newer.

Landed in version: 3.15.0-0.0.pre
In stable release: 3.16

Design document:

• flutter.dev/go/windows-arm64

Relevant pull requests:

• Introduce architecture subdirectory for Windows build