Signed-off-by: Morten Linderud <foxboron@archlinux.org>

archlinux/devtools!109 (comment 74475)

Add PGP signature, and retain i2c/smbus.h

FTR, commands used to change arch=() and then verify the changes:

$ sed -Ei "/^arch=/{s/ *?['\"]?i686['\"]? *?//;s/ *$//}" */*/PKGBUILD*

$ grep -r i686 * | grep arch= | grep -v repos

$ svn diff | grep -A 1 ^-[^-] | grep -v -- -- | cut -c2- |
  while IFS=$'\n' read -r l1; IFS=$'\n' read -r l2; do
    echo "$l1 -> $l2"
  done | sort -u

Add smbus python3 support, update to 3.1.2

Update sources to archlinux mirror.

Python2 is an optdependency and not a harddep.
Perl however is a hardep.