fix relative path for build pip package script (#52)
fix relative path for build pip package script (#52)

* readlink does not work on mac, use pwd

* add surrounding quotes

tensorflow/tfjs,tensorflow/tfjs-converter,tensorflow/tfjs-converter,tensorflow/tfjs,tensorflow/tfjs-converter,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs-converter,tensorflow/tfjs,tensorflow/tfjs-converter