Cosmetic: LD_PRELOAD cannot be preloaded (ELF file OS ABI invalid): ignored

In helloSystem we are using `LD_PRELOAD` to load a library into each application.

Natually this does not work for Linux binaries, resulting in lots of these errors:

```
ERROR: ld.so: object '/usr/local/lib/libQKeySequenceOverride.so.1.0.0' from LD_PRELOAD cannot be preloaded (ELF file OS ABI invalid): ignored.
```

Is there a way to tell the Linuxulator not to `LD_PRELOAD` non-Linux libraries into Linux binaries?

cc @trasz