Nautilus: Selinux support turned off by default

[Carlos Soriano <csoriano gnome org>]

Hello,

Selinux support is now turned off by default in Nautilus since 3.27.4. You can read more about it in the commit.

The only change needed for those distros using it is to enable it with -Dselinux=true in Meson.

Carlos Soriano