Let child process handle SIGINT in flatpak enter
Let child process handle SIGINT in flatpak enter

Otherwise when running software that handles SIGINT, such as gdb or
python, pressing ^C would kill flatpak-enter and return control to the
shell.

flatpak/flatpak,flatpak/flatpak,flatpak/flatpak,flatpak/flatpak,flatpak/flatpak