Fix logical typo in _compare_trilu_indices (#64468)
Summary:
I'm pretty sure that repeating the same call twice is pretty meaningless and intend was to call `tril`/`tril_indices` in first case and `triu`/`triu_indices` in another
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64468
Reviewed By: mruberry
Differential Revision: D30744978
Pulled By: malfet
fbshipit-source-id: 7cd36789a7ebf1cc263fb2d875e479c05e7588a4
