New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/issues/12548#issuecomment-764995543

Comment:
Yes, it fails on x86_64 also:
```
There's something wrong with native string compare function. Applying workaround (slower).
======= BEGIN OF BACKTRACE =====
[0] /usr/lib/kadu/libkadu.so(+0x4364a0) [0x7f68b67414a0]
[1] /usr/lib/libc.so.6(+0x3d000) [0x7f68b49db000]
======= END OF BACKTRACE  ======
Aborted
```

Since upstream had no updates in 4 years and `kadu` depends on the possible security problem `qt5-webkit` I think we should remove the package.