Only add directories to libraryLocationsInAppDir that contain .so files

[probonopd]

Closes #314

[github-actions]

Build for testing:
artifacts
Use at your own risk.

[brunvonlope]

Downloading the artifact. For some reason download speed is at 80Kbps

[probonopd]

Download is much faster here, maybe cancel and try again?

[brunvonlope]

Hmmm, I could download it clicking on the link but didn't succeeded to download the artifacts from CLI with wget. I need to do this to be able to test on GitLab CI

[probonopd]

GitHub only gives artifacts downloads to logged in users. Hence I uploaded it here. Try this:

appimagetool-856-x86_64.zip

[brunvonlope]

It fails with the following error:

ERROR ReadDir: open /builds/GNOME/gimp/AppDir/usr/lib/llvm-14/lib: no such file or directory

Full log: https://gitlab.gnome.org/GNOME/gimp/-/jobs/4528193

Sorry for the huge delay, our infra is in a transition phase.

[github-actions]

Build for testing:
artifacts
Use at your own risk.

Link that should work without login:
appimagetool-859-x86_64.zip

[brunvonlope]

According to the logs (https://gitlab.gnome.org/GNOME/gimp/-/jobs/4528886), only lib/arch_triplet and lib64 are inserted in RPATH, so the situation gets worse with the patch because it can't find any other dir.

[probonopd]

Argh. I need a local test case... Sorry for the noise!