[arch-general] Add wpa_supplicant to the Group 'Base'

[H8H]

Hi

I recently installed archlinux over the air (wifi) and after a reboot I
realizied sh**t you forgot to install wpa_supplicant to get connect to
the world (over wifi / wpa/wpa2) and install more packages. So I had to
restart, boot to the live system, mount the whole crypt stuff,
(arch-chroot) and install wpa_supplicant.

In my opinion wpa_supplicant is an important tool, so is it possible to
add it to the group 'base'?

Cheers
H8H