pytorch

18d1896b - Fix confusing "does not have GPU support" warning message (#30721)

Fix confusing "does not have GPU support" warning message (#30721) Summary: Many people who use caffe2 are confused about "does not have GPU support" warning message. https://github.com/facebookresearch/video-nonlocal-net/issues/6 facebookarchive/caffe2#346 facebookarchive/caffe2#1634 facebookarchive/caffe2#197 Many none GPU reasons can cause this warning message. It is better to give the error info.  Pull Request resolved: https://github.com/pytorch/pytorch/pull/30721 Differential Revision: D19697413 Pulled By: ezyang fbshipit-source-id: bd24b7c814e7e677352068b9e9f77a68de080159