message: Fix nsync build issue
diff: @@ -110,7 +110,7 @@ if [[ -z "${BUILD_ARCH}" ]]; then
  TARGET_NSYNC_LIB=`tensorflow/contrib/makefile/compile_nsync.sh -t ios`
  else
  # arch specified so build just that
  - TARGET_NSYNC_LIB=`tensorflow/contrib/makefile/compile_nsync.sh -t ios -a ${BUILD_ARCH}`
  + TARGET_NSYNC_LIB=`tensorflow/contrib/makefile/compile_nsync.sh -t ios -a "${BUILD_ARCH}"`
  fi
  export HOST_NSYNC_LIB TARGET_NSYNC_LIB
  