pacman2appDir should support Antergos

[probonopd]

Antergos is an Arch-based distribution. Currently ./PortableLinuxGames/pacman2appDir vlc gives Distro not supported.

I think a better way to detect the distribution would be something like

grep 'ID_LIKE="arch"' /etc/os-release >/dev/null && echo "Arch found"