Disable smart_tensor_printer_test on OSX
Disable smart_tensor_printer_test on OSX

Summary:
TravisCI failure: https://travis-ci.org/lukeyeager/caffe2/jobs/240947529

Copies solution from https://github.com/caffe2/caffe2/commit/ef688490c483d111c73222d49decf25337fee0eb
Closes https://github.com/caffe2/caffe2/pull/768

Differential Revision: D5264295

Pulled By: akyrola

fbshipit-source-id: 891fd747a5df3edd94218dbf461a2d936d334688

pietern/caffe2,xzturn/caffe2,davinwang/caffe2,davinwang/caffe2,bwasti/caffe2,Yangqing/caffe2,Yangqing/caffe2,pietern/caffe2,davinwang/caffe2,sf-wind/caffe2,sf-wind/caffe2,bwasti/caffe2,sf-wind/caffe2,pietern/caffe2,davinwang/caffe2,xzturn/caffe2,xzturn/caffe2,caffe2/caffe2,pietern/caffe2,Yangqing/caffe2,xzturn/caffe2,sf-wind/caffe2,xzturn/caffe2,Yangqing/caffe2,bwasti/caffe2,pietern/caffe2,Yangqing/caffe2,bwasti/caffe2,bwasti/caffe2,davinwang/caffe2,sf-wind/caffe2