community/proj: fix install of datumgrid files
In changing from autoconf to CMake an issue has arose where the datum files are not being installed. (Shame on me for not noticing this)
It looks like the proj package is now missing gridfiles:
vs.
I don't believe stuffing the default grid files into the datumgrid package is a good idea either. I have made it so only the extra datumgrid files are in this package. The default proj gridfiles install as part of proj, as one would expect.
This is all fairly moot as PROJ changed grid files in 7.0.0: https://github.com/OSGeo/PROJ-data which I will update the APKBUILD and provide a MR once pyproj supports this in pyproj 3.0.0.
Edited by TBK