libguestfs: add 1.26.5-1 from AUR
libguestfs: update to 1.26.7-1, improve packaging

Changes:
 - Allow the python version to be changed (default to 3 instead of 2).
 - Disable OCaml to reduce dependencies.
 - Disable building static libraries.
 - Remove `-j3` from `make`, this option should be set in
   /etc/makepkg.conf using MAKEFLAGS.
 - To reduce bandwidth usage for RH, and to speed up the installation
   process, keep the downloaded appliance cached in /var/cache/guestfs.
 - Remove use of temporary directory for the appliance, saving 510 MiB
   in /tmp/.
 - Fix mixed tabs/spaces, trailing spaces.
 - Added check target, disabled due to spurious (?) failures.
 - Added file and fuse to depends, removing fuse from makedepends (fixes
   namcap warnings).
 - Avoid outputting download progress when output is not a tty (e.g. a
   file) to avoid spamming adding 1.8k lines to /var/log/pacman.log.
hivex: add 1.3.9-2 from AUR
hivex: update to 1.3.10-1, improve packaging

Changes:
 - Fixed license (LGPL 2.1).
 - Disabled optional Ruby and OCaml bindings.
 - Allow customization of Python version (defaults to 3 now).
 - Explicitly disable or enable package to avoid surprises.
 - Add `--disable-static` and `--disable-rpath` options (but note that
   namcap still warns about an insecure rpath in
   usr/lib/perl5/site_perl/auto/Win/Hivex/Hivex.so, likely due to
   hard-coded flags in MakeMaker or something).
 - Remove duplicate md5sums, add signature.
 - Remove adding /usr/bin/core_perl to PATH, your shell must source
   /etc/profile (which picks up perlbin.sh) for this.