There's a merged pull request on the void-packages repository

qt5: use a sane default platform
https://github.com/void-linux/void-packages/pull/49810

Description:
on `arm*`/`aarch64*`, qt5 defaults to the `eglfs` QPA platform, which is designed for embedded devices. because this is probably a less-common use-case on Void, it's more sane to default to `xcb`, like `x86_64*` does.

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#### Testing the changes
- I tested the changes in this PR: **YES**