Comment 8 for bug 1916394

I tried something else, and build process went right: building qemu in a clean-chroot: https://wiki.archlinux.org/index.php/DeveloperWiki:Building_in_a_clean_chroot

 Well, something is broken on my real installation, or it could be a bug in a package as I'm using testing. Anyway, this bug can be closed as I can build Qemu successfully now.