build: Limit Glib version gate macros to flatpak-builder target#725

bbhtt merged 1 commit intoflatpak-builder-1.4.xflatpak/flatpak-builder:flatpak-builder-1.4.xfrom

bbhtt/fix-glib-deprecationsflatpak/flatpak-builder:bbhtt/fix-glib-deprecationsCopy head branch name to clipboard