Adds dosfstools to the PKGBUILD depends

[digital-raven]

One of the tools needed by archinstall is mkfs.fatXX and this wasn't automatically installed.

• I don't know if this issue is present on the github. I'll open one if required; the contributing guideline did not impose a requirement for an existing issue.

PR Description:

This adds dosfstools, which provides the mkfs.fat binary which is used in device_handler.py

Tests and Checks

When I run makepkg -s on my system with or without this change, I receive an error that my build did not pass the "validity check". I don't know if this has bearing on the integrity of this change, so I left the following checklist for what I believe would be a good test of this change.

• Using archinstall as installed using pacman -S archinstall and try to format any partition using a code path that relies on mkfs.fat, archinstall will error because this tool is not installed.
• When I ran makepkg -si, dosfstools was installed on my system along with archinstall.

[digital-raven]

Hey guys, I'm still watching this! It's not a big deal for me personally as I was able to just install it and that's a decent workaround, but this is something that I think a newer user would be intimidated by were they to use archinstall on its own. I think it's a short and sweet improvement.

[svartkanin]

Are you saying that it's missing on the ISO or that it could be missing when running archinstall on another system?

[digital-raven]

It's missing when running archinstall on another system. If dosfstools is not already present, then pacman -S archinstall will not install it, and it's a necessary tool for archinstall's operation.

[svartkanin]

I think in that guess it's reasonable to include it in the configuration

[Torxed]

IT doesn't hurt to add it, if it's used to bootstrap a VM for instance from an existing system.
But we've gotten lucky that the ISO releng has it shipped automatically.

[svartkanin]

I assumed it should as it's a requirement for it to work on the iso, but I didn't check to make sure. Thanks @Torxed for confirming