test(melange): add emit_stdlib false to recompile-dependents.t (#11695)

Signed-off-by: Antonio Nuno Monteiro <[email protected]>

Author: anmonteiro

test/blackbox-tests/test-cases/melange/recompile-dependents.t

@@ -24,6 +24,7 @@ Set up and build a Melange library and `melange.emit`
   $ cat > dune <<EOF
   > (melange.emit
   >  (target out)
+  >  (emit_stdlib false)
   >  (libraries foo))
   > EOF
   $ cat > x.ml <<EOF