gh-38020: Workaround for passing givaro library to linker on OSX
Just hack the missing -lgivaro into the linker command, see also
https://github.com/linbox-team/fflas-ffpack/issues/391 for the real bug
Closes https://github.com/sagemath/sage/issues/38002
URL: https://github.com/sagemath/sage/pull/38020
Reported by: Volker Braun
Reviewer(s):
