Add better support for armv7a cross compilation #2965

Job	Run time
cabal	1m 29s
cabal-doExactConfig	1m 26s
runghc	1m 28s
nix-build	2m 54s
unit-tests	7s
build-extra-hackages	12s
docs	33s
hix	2m 13s
multi-target	2m 0s
maintainer-scripts	8s
plan-extra-hackages	7s
shellFor-hoogle	2m 10s
shellFor-multiple-package	2m 10s
shellFor-not-depends	29s
shellFor-single-package	1m 59s
tests-benchmarks	13s
check-materialization-concurrency	24s
check-path-support	13s
closure-size	3s
haskell-nix-roots-do-not-require-IFDs	18s
hydra-ifdLevel-0-and-1	5m 42s
hydra-ifdLevel-2	14m 29s
hydra-ifdLevel-3	30m 16s
hydra-without-remote-builders-ghc9101	5m 39s
hydra-without-remote-builders-ghc966	3m 38s
nix-tools	22s
update-docs	5s
hix-cabal	5m 10s
	1h 25m 57s

Provide feedback