OESA-2021-1149 flatpak security update

flatpak is a system for building, distributing and running sandboxed desktop applications on Linux. See https://wiki.gnome.org/Projects/SandboxedApps for more information. Security Fixes: Flatpak before 1.0.7, and 1.1.x and 1.2.x before 1.2.3, exposes /proc in the applyextra script sandbox, which...