Arch linux x86_64 not available for pull to local assets

[vikzil]

In web interface section Local Assets only archlinux-32 is available for pulling to Local Assets. The x86_64 version is missing in the list. x86_64 version is available in boot menu, but does not work with Local Mirror, because it expects arch linux x86_64 files, that currently cannot be pulled from web interface. It would be nice if support for pulling even archlinux x86_64 version would be supported. I also suspect that some of the reports of Local Mirror Access not working are caused by this, as archlinux is on top of the list of distros to test.