Do not require AVX when building with SAGE_FAT_BINARY #32434
Description
Setting CFLAGS to -mno-avx -mno-avx2 -mno-bmi2 should help the produced binaries work on older processors.
Move from sagemath/binary-pkg#31
CC: @culler @dimpase @embray @kiwifb @kliem @orlitzky @mkoeppe @slel @kwankyu
Component: build
Author: Samuel Lelièvre
Branch/Commit: u/soehms/adapt_fat_binary_32434 @ 3c61bf2
Reviewer: Sebastian Oehms, ...
Issue created by migration from https://trac.sagemath.org/ticket/32434