I don't think this is much use in our common workflow. Our pacman
configs don't even make a reference to /repo.

Separates the two features of mkarchroot. Provides users of the new
arch-nspawn with the full feature set of systemd-nspawn.

For example, this can be used to bind custom directories into the chroot.

This build system overhaul allows for adding (define-style) macros to
our scripts. All source files are now suffixed with ".in" to clarify
that they might contain unprocessed defines. The Makefile provides a new
rule to preprocess source files and generate proper output scripts.

Also, add a "@pkgdatadir@" define (as used in GNU Autotools) and use it
instead of hardcoded paths to "/usr/share/devtools" everywhere. We
missed this when adding PREFIX support to the build system in commit
35fc83ce

.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

Signed-off-by: Eric Bélanger <snowmaniscool@gmail.com>
Signed-off-by: Pierre Schmitz <pierre@archlinux.de>