Not tested but trivially, libgdk-3.so.0 from (build) Ubuntu 22.04
should not be incompatible when running on the same distro.
This is not known to cause issues but better to remove this since it
the original use case seem no longer being valid. Track just the
excludelist from AppImage creator.
commented out libgdk_pixbuf-2.0.so.0
Normal build no longer runs on Rocky Linux 9 but alternative build (built
on centos 7) does. But conversly excluding the files causes dependency
problems for vcap/file vcomp/lavc, vdisp.file, vdisp/gl. Tested on Alma
9.6, which shuld be basically the same as Rocky. After re-adding the
problem disappears.
Doesn't seem to be required and nwo (since the new PPA use) causes following error:
```
ultragrid_vidcap_rtsp.so: /lib/x86_64-linux-gnu/libgnutls.so.30: undefined symbol: nettle_siv_gcm_aes256_decrypt_message, version NETTLE_8
``
(obviously) when libgnutls30 is not installed, eg. in Ubuntu 24.04.
