FPLLL 5.4.0 and FPyLLL 0.5.4

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Tarball URLs - see `checksums.ini`

CC:  @kiwifb

Component: **packages: standard**

Keywords: **sd111**

Author: **Martin Albrecht**

Branch: **[`29fcb34`](https://github.com/sagemath/sagetrac-mirror/commit/29fcb343129730537546e2c7c0d65906bb602de5)**

Reviewer: **Matthias Koeppe**

_Issue created by migration from https://trac.sagemath.org/ticket/31025_

