Merge pull request #145149 from veprbl/pr/tensorflow_zhf_2111

pythonPackages.tensorflow: fix for darwin

pkgs/development/python-modules/tensorflow/default.nix

···
     bazelBuildFlags = [
       "--config=opt" # optimize using the flags set in the configure phase
     ]
+    ++ lib.optionals stdenv.cc.isClang [ "--cxxopt=-x" "--cxxopt=c++" "--host_cxxopt=-x" "--host_cxxopt=c++" ]
     ++ lib.optionals (mklSupport) [ "--config=mkl" ];
 
     bazelTarget = "//tensorflow/tools/pip_package:build_pip_package //tensorflow/tools/lib_package:libtensorflow";