Introduce cross-compiled ARM64 build

[Lgt2x]

Pull Request Type

• GitHub Workflow changes
• Documentation or Wiki changes
• Build and Dependency changes
• Runtime changes
  • Render changes
  • Audio changes
  • Input changes
  • Network changes
  • Other changes

Description

Using the HogMaker build changes of #637 , introduce an example of cross-compilation to ARM64. This also serves as non-regression automated build for this type of compilation.

The changes to vcpkg.json are due to a VCPKG issue causing dbus cross-compilation to fail. The best solution would be to report the issue upstream to dbus, but for the time being, we simply disable the optional SDL2 dependency to dbus.

find_package(HogMaker) is now in top-level CMakeLists.txt, because otherwise the exported targets would not be found.

The changes

Checklist

• I have tested my changes locally and verified that they work as intended.
• I have documented any new or modified functionality.
• I have reviewed the changes to ensure they do not introduce any unnecessary complexity or duplicate code.
• I understand that by submitting this pull request, I am agreeing to license my contributions under the project's license.

Additional Comments

[winterheart]

This can be simpified with

ninja -f build-${{ matrix.build_type }}.ninja -C builds/linux/ HogMaker

[Lgt2x]

fixed