Patch giac so that libintl from /usr/local does not leak in on macOS #31562
Description
Crucial for building binary distributions on systems that have homebrew installed.
CC: @vbraun @kiwifb @dimpase @sagetrac-parisse @frederichan-IMJPRG
Component: packages: standard
Author: Matthias Koeppe
Branch/Commit: 89f61d2
Reviewer: François Bissey
Issue created by migration from https://trac.sagemath.org/ticket/31562