Add lld to shell-for when using lld for ghc

Author: TeofilC

builder/shell-for.nix

@@ -124,6 +124,7 @@ in
       ++ nativeBuildInputs
       ++ mkDrvArgs.nativeBuildInputs or []
       ++ lib.attrValues (buildPackages.haskell-nix.tools compiler.nix-name tools)
+      ++ (lib.optional (ghc.useLdLld or false) llvmPackages.bintools)
       # If this shell is a cross compilation shell include
       # wrapper script for running cabal build with appropriate args.
       ++ lib.optional (ghcEnv.targetPrefix != "") (