[arch-general] update to calibre-0.9.15-1

[phani]

during today's update from calibre 0.9.14-1 -> 0.9.15-1, pacman complained
that all packages under /usr/lib/calibre/calibre were already existing in
the filesystem, and therefore the update couldn't be performed.

for some reason "pacman -Qo" claimed that all these files didn't belong to
any package. only after moving them from that location somewhere else
could the new version of calibre be installed.

looks to me as if this is some packaging error. don't know enough about
arch packaging though to say what exactly went wrong...

-- 
phani.