new packages: libspatialite 4.2.0, spatialite-tools, fix libfreexl pkg-config

I have managed to compile spatialite executables (spatial-extended sqlite), but some patching was done.
Could you have a look? (I'll comment the problematic places of code)
Is this suitable or mingw-w64-x86_64-geos PKGBUILD should be improved to use default  ``geos-config`` name?