libspatialite: include head build (required: comment out ‘head’ line in fossil.rb)
gpkgtools: new formula, head-only; python tools for OGC GeoPackage mapping container
fossil: dupe of home-brew’s with fix for recursion; remove head url
brewfile: ogc-geopackage; one-shot setup brewfile for experimenting with OGC GeoPackage tools

- NOTE: this will fail on a subsequent runs