This adds a pactest for the relocation of a config file between two packages
(case of etc/profile moving from bash to filesystem).
While running this pactest, I found out that chk_filedifference didn't work
correctly with an empty list as second argument. So that's fixed now.
Ref: http://www.archlinux.org/pipermail/pacman-dev/2007-December/010610.html
Signed-off-by: Chantry Xavier <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
