feature request: detect hardcoded paths in AppRun

[alex-tee]

my AppImage was failing because of a hardcoded rpath:

/tmp/.mount_zrythmaLNdzc//usr/bin/zrythm: error while loading shared libraries: /usr/lib/zrythm/carla/libcarla_host-plugin.so: cannot open shared object file: No such file or directory

related info from readelf -d:

0x000000000000001d (RUNPATH)            Library runpath: [/usr/lib/zrythm/carla]
0x0000000000000001 (NEEDED)             Shared library: [/usr/lib/zrythm/carla/libcarla_host-plugin.so]

I used patchelf to fix these issues. I think appimagelint should detect hardcoded paths like these

[alex-tee]

maybe related to #19