Added rtpostgis_drop.sql, rtpostgis_drop.sql.in, rtpostgis_upgrade.sql and...

Added rtpostgis_drop.sql, rtpostgis_drop.sql.in, rtpostgis_upgrade.sql and rtpostgis_upgrade_20_minor.sql to svn:ignore


git-svn-id: http://svn.osgeo.org/postgis/trunk@8012 b70326c6-7e19-0410-871a-916f4a2858ee