Patches for passing through customizepkg errors, and for Artix' repos.

[dreirund]

I made two patches which I want to attach here:

• yaourt_customizepkg-abort-on-error.patch.txt: Makes yaourtabort instead of silently continue if applying a customizepkg-hook fails.
• yaourt_artix-abs.patch.txt: Adds to abs.sh code to download source packages from Artix Linux repositories (and also patches pkgbuild.sh to pass through errors).

yaourt's PKGBUILD should then also be patched to add to optdepends: 'subversion: Download PKGBUILD/ package sources from Artix repositories'.

[dreirund]

See https://aur.archlinux.org/packages/yaourtix-git/ or https://aur.archlinux.org/packages/yaourtix/. Handles other repos for ABS as well.