eclass/toolchain: Sync with Gentoo

It's from Gentoo commit 9cd89e7d13a529ad439a9d8abae615943c08e78e.
This commit is contained in:
Flatcar Buildbot 2023-09-04 07:13:27 +00:00 committed by Krzesimir Nowak
parent c2219291b3
commit dc679f5166

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@ -1395,6 +1395,7 @@ downgrade_arch_flags() {
# "added" "arch" "replacement"
local archlist=(
12.3 znver4 znver3
10 znver3 znver2
9 znver2 znver1
4.9 bdver4 bdver3