odin: fix patches for darwin

  LLVM_CONFIG = "${llvmPackages.llvm.dev}/bin/llvm-config";

  postPatch = lib.optionalString stdenv.isDarwin ''

    sed -i src/main.cpp \

      -e 's|-syslibroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk|-syslibroot ${MacOSX-SDK}|'

    substituteInPlace src/linker.cpp \

        --replace-fail '/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk' ${MacOSX-SDK}

    '' + ''

    sed -i build_odin.sh \

      -e 's/^GIT_SHA=.*$/GIT_SHA=/' \

      -e 's/LLVM-C/LLVM/' \

      -e 's/framework System/lSystem/'

    substituteInPlace build_odin.sh \

        --replace-fail '-framework System' '-lSystem'

    patchShebangs build_odin.sh

  '';