Add libgdal-1.dll as candidate

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@40903 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/raster/gdal.c

@@ -103,6 +103,7 @@ static void load_library(void)
 	"gdal15.dll",
 	"gdal11.dll",
 	"gdal.1.0.dll",
+	"libgdal-1.dll",
 	"gdal.dll",
 # endif
 	NULL