test/data: added select4_ref and select5_ref

.gitattributes

@@ -619,6 +619,8 @@ test/data/pl_data.grb -text
 test/data/select1_ref -text
 test/data/select2_ref -text
 test/data/select3_ref -text
+test/data/select4_ref -text
+test/data/select5_ref -text
 test/data/sp2gp_ref -text
 test/data/sp2gpl_ref -text
 test/data/t21_geosp_tsurf.grb -text

test/data/gen_refdata.sh

@@ -83,4 +83,8 @@ OFILE=select2_ref
 $CDO select,code=130,152,level=9000,90 $IFILE $OFILE
 OFILE=select3_ref
 $CDO select,code=130,152,level=9000,90,timestep=2,3,5 $IFILE $OFILE
+OFILE=select4_ref
+$CDO select,code=130 $IFILE $OFILE
+OFILE=select5_ref
+$CDO select,level=90000 $IFILE $OFILE
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