With PyQtWebEngine-Qt5 5.15.17 (Qt 5.15.19), we seem to run into similar issues
like we already did with Qt 6.5:
https://github.com/qutebrowser/qutebrowser/issues/7624#issuecomment-14740084709cb54b2099
However, skipping the ELF test is not enough, as we also get warnings
at runtime (as we don't have any API to get the version at runtime).
We don't care much about Qt 5 at this stage, so let's just not output
warnings in that case (and nothing in the code should care about the exact
QtWebEngine patch level beyond 5.15.2 anyways).
For most user-facing things, we *can* get the exact version number from
the user-agent, so this should not actually affect much.
072b03a631