rank_filter.recipe/meta.yaml: Allow the c/c++ compilers to be set.
rank_filter.recipe/meta.yaml: Allow the c/c++ compilers to be set.

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