add archlinux build

[palytoxin]

I'm trying to create archlinux build

[ashkulz]

@palytoxin: thanks for the contribution, appreciate your trying to make a build.

You should always test the PR by running ./build package-docker archlinux-amd64 WKHTMLTOPDF-SRC-DIR and testing that the generated package works on your machine.

[palytoxin]

I was add gcc7 and pacman build config. and test compile-docker package-docker passed in my machine.
Please correct me if there is any mistake
pacman pkg have some problem

[ashkulz]

Looks good! Were you able to install the packages? I got an error in a clean docker environment:

error: failed to commit transaction (conflicting files)
wkhtmltox: /usr/local/share/man exists in filesystem (owned by filesystem)
Errors occurred, no packages were upgraded.

I don't use ArchLinux, don't know if you can still proceed with this?

[palytoxin]

I will test and fix it, well, it may take some time

I have a problem, the config prefix path is /usr/local, but it's not standards path in archlinux, /usr is valid.
I create a dup config section for prefix. It seems to be redundancy. ennnn.. how can I fix it?

[dockerlead]

@ashkulz Can you merge this pr if it works fine?

[ashkulz]

Looks good, thanks!

[ashkulz]

Thanks for the contribution, @palytoxin!

[ashkulz]

Added to the downloads page 🎉

[ashkulz]

@foutrelis you might want to use this package in wkhtmltopdf-static, not sure how it can be used directly 🤷‍♂️