ci: Make use of arch-meson in PKGBUILD
ci: Make use of arch-meson in PKGBUILD

The helper specify `-D b_lto=true` though, so override that since it fails to build with it.
hughsie/fwupd,vathpela/fwupd,fwupd/fwupd,vathpela/fwupd,superm1/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,vathpela/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,superm1/fwupd,vathpela/fwupd,superm1/fwupd