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

Add libQtWebkit.so.4 to common/shlibs
https://github.com/void-linux/void-packages/pull/25411

Description:
The commit message follows in the end. One remark that I have to make is that I am not 100% sure the line that I chose to add the entry is the best one.
```
When building a modified version of "goldendict" [1], I ended up
with this error:

  SONAME: libQtWebKit.so.4 <-> UNKNOWN PKG PLEASE FIX!

Here's the package added.

[1] modified "template" of "goldendict"
Because Qt5 webkit does not render right-to-left texts nicely, I
build my "goldendict" against Qt4; i.e. replace "qt5-webkit-devel"
with "qt-webkit-devel".
```