Allow using GHC with ld.lld #3221

Job	Run time
unit-tests	9s
cabal	34m 22s
nix-build	1h 30m 13s
shellFor-single-package	36m 47s
shellFor-hoogle	36m 41s
shellFor-multiple-package	1h 5m 27s
plan-extra-hackages	14s
cabal-doExactConfig	19s
tests-benchmarks	45m 34s
runghc	57m 51s
shellFor-not-depends	22s
multi-target	3m 27s
hix	36m 27s
maintainer-scripts	8s
build-extra-hackages	22s
docs	43s
hydra-ifdLevel-0-and-1	4m 1s
hydra-ifdLevel-3	30m 17s
hydra-without-remote-builders-ghc967	3m 16s
check-materialization-concurrency	30s
hydra-without-remote-builders-ghc9102	3m 13s
check-nix-tools	15s
haskell-nix-roots-do-not-require-IFDs	17s
hydra-ifdLevel-2	7m 54s
closure-size	8s
hix-cabal	3m 2s
check-path-support	16s
update-docs	9s
	7h 42m 24s

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