Try to use Xcode 9.2 for AVX512 build with Mac OS X on Travis CI
Try to use Xcode 9.2 for AVX512 build with Mac OS X on Travis CI

gagatust/nd4j,ambraspace/nd4j,ambraspace/nd4j,smarthi/nd4j,deeplearning4j/nd4j,gagatust/nd4j,smarthi/nd4j,deeplearning4j/nd4j