Remove basedevel step from Arch x64

base-devel is required as a part of Packer and nowhere else,
as such it should be a part of the aur step
Merge branch 'basedev' of https://github.com/ColinHebert/veewee, closes #845

Conflicts:
	templates/archlinux-x86_64/aur.sh
	templates/archlinux-x86_64/basedevel.sh