Add better support for armv7a cross compilation #2978

Job	Run time
check-materialization-concurrency	20s
cabal	1m 32s
build-extra-hackages	16s
cabal-doExactConfig	1m 25s
check-path-support	1m 26s
closure-size	3s
docs	21m 41s
hix	13m 18s
hydra-ifdLevel-0-and-1	15m 42s
hydra-ifdLevel-2	20m 10s
hydra-ifdLevel-3	30m 10s
maintainer-scripts	19s
multi-target	6m 42s
nix-build	21m 24s
plan-extra-hackages	15s
runghc	23s
shellFor-hoogle	8m 24s
shellFor-multiple-package	2m 21s
shellFor-single-package	39s
tests-benchmarks	10s
unit-tests	9s
update-docs	7s
haskell-nix-roots-do-not-require-IFDs	29s
shellFor-not-depends	23s
hix-cabal	4m 56s
hydra-without-remote-builders-ghc9101	4m 0s
hydra-without-remote-builders-ghc966	13s
nix-tools	1m 18s
	2h 38m 15s

Provide feedback