Fix bind_tuples test for flambda
Fix bind_tuples test for flambda

The intermediate floats for the last comparison are lifted, hence allocated

yunxing/ocaml,yunxing/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,msprotz/ocaml,msprotz/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,msprotz/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,eliberis/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,msprotz/ocaml,msprotz/ocaml,yunxing/ocaml,eliberis/ocaml