Build libtorch binary with new ABI (#23908)
Summary:
This PR enables building libtorch with new ABI, using gcc 5.4 on Ubuntu 16.04.
Accompanying PR: https://github.com/pytorch/builder/pull/335.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23908
Differential Revision: D16898009
Pulled By: yf225
fbshipit-source-id: 516b444c1fc94c7b05d3be84ef81ef23e9041bfc
