ghc-toolchain binary not in cross-compiler bindists

See: https://gitlab.haskell.org/ghc/ghc/-/jobs/1641836

./configure: line 12232: bin/ghc-toolchain-bin: No such file or directory
./configure: line 12401: bin/ghc-toolchain-bin: No such file or directory
./configure: line 12410: bin/ghc-toolchain-bin: No such file or directory
./configure: line 12411: bin/ghc-toolchain-bin: No such file or directory

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