tensorflow: make "build_all_ios.sh" occur error

I try to build tensorflow support at Android and iOS by makefile tutorial in current master branch 04c318b69c5b565436cfeeaab1cb7fd5419dde27

When running the build_all_ios.sh script, the below error message show

Undefined symbols for architecture x86_64:
  "nsync::nsync_mu_init(nsync::nsync_mu_s_*)", referenced from:
      tensorflow::mutex::mutex() in env.o
      tensorflow::mutex::mutex() in random.o
  "nsync::nsync_mu_lock(nsync::nsync_mu_s_*)", referenced from:
      tensorflow::mutex::lock() in env.o
      tensorflow::mutex::lock() in random.o
      tensorflow::mutex::lock() in histogram.o
  "nsync::nsync_mu_unlock(nsync::nsync_mu_s_*)", referenced from:
      tensorflow::mutex::unlock() in env.o
      tensorflow::mutex::unlock() in random.o
      tensorflow::mutex::unlock() in histogram.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [/Users/CSL.Peter/tensorflow/tensorflow/tensorflow/contrib/makefile/gen/host_bin/proto_text] Error 1
+ '[' 2 -ne 0 ']'
+ echo 'armv7 compilation failed.'
armv7 compilation failed.
+ exit 1

The download_dependencies.sh and compile_ios_protobuf.sh run successfully but compile_ios_tensorflow.sh failed. I find same issues #3191 and #4252 and seem to be fixed at #4287, but this problem still happen.