Log Message:
geography/gdal-lib: Add an always-off half option for ODBC

Following a report of build of gdal linking against ODBC, force off
ODBC support so that even if it the lib leaks through buildlink3 it
will not be used.  In theory this could be an option similar to pgsql
and mysql support, and that is left to someone who wants it, if such a
person actually exists.  For now, this is unconditionally the half of
the option that enforces not looking for ODBC.

No PKGREVISION, because the build should not be changing.