Add the multilib Flatpak SDK extensions

Author: redstrate

zone.xiv.novus.yml

@@ -4,6 +4,8 @@ runtime-version: '6.8'
 sdk: org.kde.Sdk
 sdk-extensions:
   - org.freedesktop.Sdk.Extension.rust-stable
+  - org.freedesktop.Sdk.Compat.i386
+  - org.freedesktop.Sdk.Extension.toolchain-i386
 command: novus-launcher
 build-options:
   append-path: /usr/lib/sdk/rust-stable/bin