Allow using GHC with ld.lld #3222

Job	Run time
nix-build	1h 2m 43s
unit-tests	10s
runghc	59m 48s
build-extra-hackages	31m 54s
hix	42m 44s
shellFor-single-package	46m 28s
tests-benchmarks	31m 14s
maintainer-scripts	13s
docs	1m 14s
cabal	47m 18s
shellFor-not-depends	37s
shellFor-multiple-package	15m 25s
multi-target	19m 30s
plan-extra-hackages	16s
cabal-doExactConfig	21s
shellFor-hoogle	14m 36s
hydra-ifdLevel-2	6m 21s
hydra-without-remote-builders-ghc967	2m 29s
haskell-nix-roots-do-not-require-IFDs	27s
check-path-support	2m 42s
hydra-ifdLevel-0-and-1	4m 38s
hix-cabal	5m 52s
hydra-ifdLevel-3	30m 18s
hydra-without-remote-builders-ghc9102	2m 11s
check-materialization-concurrency	29s
check-nix-tools	25s
update-docs	10s
closure-size	9s
	7h 10m 42s

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