When a SELECT statement is terminated by a ROLLBACK TO operation, make the

error message be "abort due to ROLLBACK" rather than 
"callback requested query abort".

FossilOrigin-Name: 34fc4a082c192830e48f643549c04a4f91912b8b

test/savepoint7.test

@@ -78,7 +78,7 @@ do_test savepoint7-2.1 {
   } msg]
   db eval {RELEASE x1}
   list $rc $msg [db eval {SELECT * FROM t2}]
-} {1 {callback requested query abort} {}}
+} {1 {abort due to ROLLBACK} {}}
 
 do_test savepoint7-2.2 {
   db eval {DELETE FROM t2;}
@@ -93,6 +93,6 @@ do_test savepoint7-2.2 {
     }
   } msg]
   list $rc $msg [db eval {SELECT * FROM t2}]
-} {1 {callback requested query abort} {}}
+} {1 {abort due to ROLLBACK} {}}
 
 finish_test