flatpak (sat_wrapper): don't use packages from $HOME in PYTHONPATH to avoid conflicts: before this change, packages from ~/.local/lib/python2.7/site-packages when included, and this could conflict with the ones from Flatpak, resulting in unwanted side effects (e.g. OMEMO not available).

{
    "_build_settings": {
        "package": "sat",
        "wrapped_command": "primitivus",
        "dev_repos": {"type": "hg", "url": "https://repos.goffi.org/sat"}
    }
}