New review comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/32980#discussion_r711673863

Comment:
```
/usr/lib/gcc/arm-linux-musleabihf/10.2.1/../../../../arm-linux-musleabihf/bin/ld: qt/CMakeFiles/mgba-qt.dir/library/LibraryController.cpp.o: undefined reference to symbol '__atomic_compare_exchange_8'
/usr/lib/gcc/arm-linux-musleabihf/10.2.1/../../../../arm-linux-musleabihf/bin/ld: /usr/arm-linux-musleabihf/usr/lib/libatomic.so.1: error adding symbols: DSO missing from command line
```

something goes wrong in building >.<