Handle an upcoming change in LLVM
Handle an upcoming change in LLVM

Summary:
LookupResult loses its default copy constructor in
top of tree LLVM. We can prepare safely for this now.

Reviewers: fromberger, shahms

Reviewed By: shahms

Differential Revision: https://phabricator-dot-kythe-repo.appspot.com/D792

benjyw/kythe,legrosbuffle/kythe,bowlofstew/kythe,bowlofstew/kythe,benjyw/kythe,legrosbuffle/kythe,benjyw/kythe,legrosbuffle/kythe,bowlofstew/kythe,bzz/kythe,bzz/kythe,legrosbuffle/kythe,bowlofstew/kythe,benjyw/kythe,bzz/kythe,bzz/kythe,kythe/kythe,bowlofstew/kythe,benjyw/kythe,bzz/kythe,kythe/kythe,bzz/kythe,bowlofstew/kythe,bowlofstew/kythe,bowlofstew/kythe,benjyw/kythe,legrosbuffle/kythe,legrosbuffle/kythe,benjyw/kythe,legrosbuffle/kythe,legrosbuffle/kythe,kythe/kythe,bzz/kythe,benjyw/kythe,bowlofstew/kythe,legrosbuffle/kythe,kythe/kythe,kythe/kythe,kythe/kythe,benjyw/kythe,kythe/kythe,bzz/kythe,benjyw/kythe,legrosbuffle/kythe,bzz/kythe,bzz/kythe,kythe/kythe,kythe/kythe,legrosbuffle/kythe,bzz/kythe,benjyw/kythe,benjyw/kythe,kythe/kythe,kythe/kythe,bowlofstew/kythe,bzz/kythe,bowlofstew/kythe