cmake/modules/FindVIGRA.cmake: Switch VIGRA_INCLUDE_DIR search order.
cmake/modules/FindVIGRA.cmake: Switch VIGRA_INCLUDE_DIR search order.

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