Add package qd (optional dependency of fplll)

[mkoeppe]

https://repology.org/project/qd/versions

CC: @dimpase @malb @kiwifb

Component: packages: optional

Issue created by migration from https://trac.sagemath.org/ticket/31792

[dimpase]

comment:1

qd is a pretty must standard on Linux, e.g. on Fedora it's qd and qd-devel (and qd on Gentoo and Homebrew).

And there is qd-config script (as well as it's known to pkg-config). On Fedora fplll is already linked to qd.