Provide a 32-bit compatibility extension for flatpak runtime
We are currently working on Lutris flatpak, which depends on Gnome Sdk and requires multiarch support simultaneously. Currently, we have to either use FD.o 32-bit extension, or build parts of Gnome Sdk ourselves, both ways introduces problems. Providing a
org.gnome.Platform.Compat.i386 extension would solve this and help us very much.