libsecret-1.so.0: cannot open shared object file

Hello, we would like to add this to https://appimage.github.io/, but currently it fails our automated test with 

```
libsecret-1.so.0: cannot open shared object file: No such file or directory
```

It needs to be bundled in the AppImage.

Reference:
https://github.com/AppImage/appimage.github.io/pull/2252