Added an archlinux PKGBUILD
Added an archlinux PKGBUILD

Gets the latest version from github until it gets tagged. v1.0.0
AUR url: https://aur.archlinux.org/packages.php?ID=63202

Signed-off-by: Baptist BENOIST <775de6e07b604f3ce62c5e317fe227616d0547dd@hydrocean.fr>

bbenoist/lddgraph,bbenoist/lddgraph