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

New package: TrenchBroom-2021.1
https://github.com/void-linux/void-packages/pull/33354

Description:
<!-- Mark items with [x] where applicable -->

https://github.com/TrenchBroom/TrenchBroom

#### General
- [x] This is a new package and it conforms to the [quality requirements](https://github.com/void-linux/void-packages/blob/master/Manual.md#quality-requirements)

#### Have the results of the proposed changes been tested?
- [ ] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
- [x] I generally don't use the affected packages but briefly tested this PR

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#### Does it build and run successfully? 
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- [ ] I built this PR locally for my native architecture, (ARCH-LIBC)
- [ ] I built this PR locally for these architectures (if supported. mark crossbuilds):
  - [ ] aarch64-musl
  - [ ] armv7l
  - [ ] armv6l-musl
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- [x] I built this PR locally for my native architecture, x86_64
- [x] I built this PR locally for these architectures (if supported. mark crossbuilds):
  - [x] x86_64-musl - success, added patch
  - [x] armv7l - failed, see [here](https://github.com/TrenchBroom/TrenchBroom/issues/3651) afaik ARM is not supported because of this, but I'm not 100% sure. The error in the builder makes me think a lib is missing, but if that issue is correct - even if we get it working, I don't think the program loads correctly because of shader issues.
  - [x] i686 - success
  - [x] i686 (crossbuild) - failed, `CMake Error: AUTOMOC for target common: Test run of "moc" executable "/usr/i686-pc-linux-gnu/usr/lib/qt5/bin/moc" failed.` any help on this would be appreciated, but I'm not sure how required crossbuilding is for this.

See readme, TB will crash on wayland if `QT_QPA_PLATFORM` is set to `wayland`.

Closes https://github.com/void-linux/void-packages/issues/31317