Add some logging to BPF dimension parsing code.
Add some logging to BPF dimension parsing code.

Sciumo/PDAL,mpgerlek/PDAL-old,radiantbluetechnologies/PDAL,boundlessgeo/PDAL,lucadelu/PDAL,DougFirErickson/PDAL,radiantbluetechnologies/PDAL,mtCarto/PDAL,Sciumo/PDAL,mtCarto/PDAL,boundlessgeo/PDAL,mtCarto/PDAL,boundlessgeo/PDAL,radiantbluetechnologies/PDAL,Sciumo/PDAL,radiantbluetechnologies/PDAL,lucadelu/PDAL,DougFirErickson/PDAL,DougFirErickson/PDAL,boundlessgeo/PDAL,mtCarto/PDAL,lucadelu/PDAL,Sciumo/PDAL,mpgerlek/PDAL-old,mpgerlek/PDAL-old,DougFirErickson/PDAL,lucadelu/PDAL,mpgerlek/PDAL-old