Drop `.cpp` from our globbed sources.
Drop `.cpp` from our globbed sources.

DudLab/rank_filter,jakirkham/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter,DudLab/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter