flatpak-run: Correctly handle symlinks in flatpak_exports_path_is_visible
flatpak-run: Correctly handle symlinks in flatpak_exports_path_is_visible

When we're resolving a symlink to see if the destination is visible, then
we have to actually append the rest of the path to look at the final
target, not just the intermediate symlinked directory.

handsome-feng/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,flatpak/flatpak,handsome-feng/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,handsome-feng/flatpak,flatpak/flatpak,handsome-feng/flatpak,flatpak/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak,matthiasclasen/flatpak